From eric at intellovations.com  Sun May  1 11:02:20 2016
From: eric at intellovations.com (Eric Floehr)
Date: Sun, 1 May 2016 11:02:20 -0400
Subject: [CentralOH] focus for numpy/scipy presentations
In-Reply-To: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
References: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
Message-ID: <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>

Neil,

I am interested in numpy and scipy for image manipulation and analysis and
would be interested in getting started with feature detection and image
classification.

Specifically for my timelapse project, I would like to identify features
like birds, the moon, airplane lights, and of course clouds. I would also
be interested in grouping sky images into groups automatically. You know
that there is blue sky and completely overcast, but there are probably
certain other types of sky and cloud cover that naturally group together
and it would be neat to be able to identify those clusters.

Don't know if any of that is possible, but that's my thoughts :-).

Thanks!
Eric



On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
wrote:

> At the last cohpy meeting, several people wrote down numpy and/or scipy
> as desired topics for future presentations.  These are very broad and
> easily turn into boring overviews of python for matlab people.  Does
> anyone have requests for a presentation on a specific scipy module,
> digital signal processing topic, or even an idea for a project that you
> heard numpy/scipy would be good for but not sure how to get started?
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From bim at digitalbim.com  Sun May  1 11:15:21 2016
From: bim at digitalbim.com (Bim Walker)
Date: Sun, 1 May 2016 11:15:21 -0400
Subject: [CentralOH] focus for numpy/scipy presentations
In-Reply-To: <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
References: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
 <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
Message-ID: <641CA95F-10A3-4478-A7AC-60E9BCBC7DE6@digitalbim.com>


Following up on what Eric said, I would also be interested in calling machine-learning frameworks from scipy, specifically things like Caffe.


Bim


On May 1, 2016, at 11:02 AM, Eric Floehr <eric at intellovations.com> wrote:

> Neil,
> 
> I am interested in numpy and scipy for image manipulation and analysis and would be interested in getting started with feature detection and image classification.
> 
> Specifically for my timelapse project, I would like to identify features like birds, the moon, airplane lights, and of course clouds. I would also be interested in grouping sky images into groups automatically. You know that there is blue sky and completely overcast, but there are probably certain other types of sky and cloud cover that naturally group together and it would be neat to be able to identify those clusters.
> 
> Don't know if any of that is possible, but that's my thoughts :-).
> 
> Thanks!
> Eric
> 
> 
> 
> On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com> wrote:
> At the last cohpy meeting, several people wrote down numpy and/or scipy
> as desired topics for future presentations.  These are very broad and
> easily turn into boring overviews of python for matlab people.  Does
> anyone have requests for a presentation on a specific scipy module,
> digital signal processing topic, or even an idea for a project that you
> heard numpy/scipy would be good for but not sure how to get started?
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
> 
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh

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From gjigsaw at gmail.com  Sun May  1 12:29:12 2016
From: gjigsaw at gmail.com (Jason Green)
Date: Sun, 01 May 2016 16:29:12 +0000
Subject: [CentralOH] Testinfra = Serverspec - ruby
In-Reply-To: <CALMbNzWfKDSDidZKh1D1UNTC=brfef5vCCm4=85pV0yd3MPC4Q@mail.gmail.com>
References: <CALMbNzUWkFp0Z0GT0da34c_aChUxww2apM1XHauYdNzD1QENzA@mail.gmail.com>
 <83D31940-1815-40F9-9715-6B9C6ADB5DF0@gmail.com>
 <CALMbNzWfKDSDidZKh1D1UNTC=brfef5vCCm4=85pV0yd3MPC4Q@mail.gmail.com>
Message-ID: <CALMbNzVoRKh013q8PVpfF5cW2vHAgQe=i9YbUxPDwHZBpJwQUw@mail.gmail.com>

Someone requested this at the most recent monthly meeting.

Python equivalent of Serverspec.

> https://testinfra.readthedocs.io/en/latest/
>
> "Testinfra aims to be a Serverspec <http://serverspec.org/> equivalent in
> python and is written as a plugin to the powerful Pytest
> <http://pytest.org/> test engine"
>
>
>
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From andrewkubera at gmail.com  Sun May  1 13:43:10 2016
From: andrewkubera at gmail.com (Andrew Kubera)
Date: Sun, 1 May 2016 13:43:10 -0400
Subject: [CentralOH] Testinfra = Serverspec - ruby
In-Reply-To: <CALMbNzVoRKh013q8PVpfF5cW2vHAgQe=i9YbUxPDwHZBpJwQUw@mail.gmail.com>
References: <CALMbNzUWkFp0Z0GT0da34c_aChUxww2apM1XHauYdNzD1QENzA@mail.gmail.com>
 <83D31940-1815-40F9-9715-6B9C6ADB5DF0@gmail.com>
 <CALMbNzWfKDSDidZKh1D1UNTC=brfef5vCCm4=85pV0yd3MPC4Q@mail.gmail.com>
 <CALMbNzVoRKh013q8PVpfF5cW2vHAgQe=i9YbUxPDwHZBpJwQUw@mail.gmail.com>
Message-ID: <B66704D8-E20F-403B-8F7C-3B4A58B436A2@gmail.com>

So is the idea that you setup your build scripts (ansible or whatever) then have a series of tests to make sure that they do what you expect them to?

-Andrew


> On May 1, 2016, at 12:29 PM, Jason Green <gjigsaw at gmail.com> wrote:
> 
> Someone requested this at the most recent monthly meeting.
> 
> Python equivalent of Serverspec. 
>> https://testinfra.readthedocs.io/en/latest/ <https://testinfra.readthedocs.io/en/latest/>
>> 
>> "Testinfra aims to be a Serverspec <http://serverspec.org/> equivalent in python and is written as a plugin to the powerful Pytest <http://pytest.org/> test engine"
> 
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh

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From gjigsaw at gmail.com  Sun May  1 14:42:05 2016
From: gjigsaw at gmail.com (Jason Green)
Date: Sun, 01 May 2016 18:42:05 +0000
Subject: [CentralOH] Testinfra = Serverspec - ruby
In-Reply-To: <B66704D8-E20F-403B-8F7C-3B4A58B436A2@gmail.com>
References: <CALMbNzUWkFp0Z0GT0da34c_aChUxww2apM1XHauYdNzD1QENzA@mail.gmail.com>
 <83D31940-1815-40F9-9715-6B9C6ADB5DF0@gmail.com>
 <CALMbNzWfKDSDidZKh1D1UNTC=brfef5vCCm4=85pV0yd3MPC4Q@mail.gmail.com>
 <CALMbNzVoRKh013q8PVpfF5cW2vHAgQe=i9YbUxPDwHZBpJwQUw@mail.gmail.com>
 <B66704D8-E20F-403B-8F7C-3B4A58B436A2@gmail.com>
Message-ID: <CALMbNzWSoEQa7GSzeFCj2GX5fqAkKDgeKww2cG6RVZJ2d2EQKA@mail.gmail.com>

Well, for TDD, you'd reverse the order of those steps, but yes.


On Sun, May 1, 2016 at 1:43 PM Andrew Kubera <andrewkubera at gmail.com> wrote:

> So is the idea that you setup your build scripts (ansible or whatever)
> then have a series of tests to make sure that they do what you expect them
> to?
>
> -Andrew
>
>
> On May 1, 2016, at 12:29 PM, Jason Green <gjigsaw at gmail.com> wrote:
>
> Someone requested this at the most recent monthly meeting.
>
> Python equivalent of Serverspec.
>
>> https://testinfra.readthedocs.io/en/latest/
>>
>> "Testinfra aims to be a Serverspec <http://serverspec.org/> equivalent
>> in python and is written as a plugin to the powerful Pytest
>> <http://pytest.org/> test engine"
>>
>>
>> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From sriveravi at gmail.com  Mon May  2 08:14:25 2016
From: sriveravi at gmail.com (Samuel)
Date: Mon, 2 May 2016 08:14:25 -0400
Subject: [CentralOH] CentralOH Digest, Vol 109, Issue 1
Message-ID: <CA+_sUCVE3=eKaOoT29r507zXWOH_29zMg4GqYUByEM_szCxudw@mail.gmail.com>

Regarding the numpy/scipy and the machine learning/image classification
topic, have you heard of OpenCV?  It has a ton of libraries and functions
for doing machine learning things and image thing.  I think that's a good
starting point.  Many of the popular feature detection and segmentation
algorithms are already there.   Images are essentially a numpy array.





On Sun, May 1, 2016 at 12:00 PM, <centraloh-request at python.org> wrote:

> Send CentralOH mailing list submissions to
>         centraloh at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>         https://mail.python.org/mailman/listinfo/centraloh
> or, via email, send a message with subject or body 'help' to
>         centraloh-request at python.org
>
> You can reach the person managing the list at
>         centraloh-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of CentralOH digest..."
>
>
> Today's Topics:
>
>    1. focus for numpy/scipy presentations (Neil Ludban)
>    2. 2016-04-29 ?? Scribbles ??/??? refactoring december meeting
>       dates dunning-kruger 3n+1 fizzbuzz sh ls -l -1 Win10 wx
>       venv/virtualenv v (ana|mini)conda pytest inittest scikit-learn
>       (jep200404 at columbus.rr.com)
>    3. Re: focus for numpy/scipy presentations (Eric Floehr)
>    4. Re: focus for numpy/scipy presentations (Bim Walker)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 30 Apr 2016 18:27:41 -0400
> From: Neil Ludban <nludban at columbus.rr.com>
> To: "Mailing list for Central Ohio Python User Group (COhPy)"
>         <centraloh at python.org>
> Subject: [CentralOH] focus for numpy/scipy presentations
> Message-ID: <20160430182741.2532ba807c2def625e3f9544 at columbus.rr.com>
> Content-Type: text/plain; charset=US-ASCII
>
> At the last cohpy meeting, several people wrote down numpy and/or scipy
> as desired topics for future presentations.  These are very broad and
> easily turn into boring overviews of python for matlab people.  Does
> anyone have requests for a presentation on a specific scipy module,
> digital signal processing topic, or even an idea for a project that you
> heard numpy/scipy would be good for but not sure how to get started?
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 30 Apr 2016 20:21:17 -0400
> From: jep200404 at columbus.rr.com
> To: centraloh at python.org
> Subject: [CentralOH] 2016-04-29 ?? Scribbles ??/??? refactoring
>         december meeting dates dunning-kruger 3n+1 fizzbuzz sh ls -l -1
> Win10
>         wx venv/virtualenv v (ana|mini)conda pytest inittest scikit-learn
> Message-ID: <20160430202117.2f4f5b2b.jep200404 at columbus.rr.com>
> Content-Type: text/plain; charset=UTF-8
>
> Explore http://colug.net/python/dojo/20160429/.
>
> http://nbviewer.jupyter.org/url/colug.net/python/dojo/20160429/dojo-20160429-2016-Mar-COhPy_Challenge_Rough.ipynb
> What more would you change for that in little function?
> Played with refactoring a function from one of the previous challenges.
> It was much fun.
>
> unskilled people are not as skilled as they think
>
>     wp:Dunning?Kruger effect
>
> dumb people are dumber than they think
> smart people are smarter than they think
>
> wp: prefix means Wikipedia
> To get good answers, consider following the advice in the links below.
> http://catb.org/~esr/faqs/smart-questions.html
>
> http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html
>
> colug.net/python/dojo/20160415/
>
> ls -l
> ls -1
>
>     dojo at 4519_n_high:~/sh$ virtualenv env
>     New python executable in env/bin/python
>     Installing setuptools, pip...done.
>     dojo at 4519_n_high:~/sh$ source env/bin/activate
>     (env)dojo at 4519_n_high:~/sh$ pip install sh
>     Downloading/unpacking sh
>       Downloading sh-1.11.tar.gz
>       Running setup.py (path:/home/dojo/sh/env/build/sh/setup.py) egg_info
> for package sh
>
>     Installing collected packages: sh
>       Running setup.py install for sh
>
>     Successfully installed sh
>     Cleaning up...
>     (env)dojo at 4519_n_high:~/sh$ python2
>     Python 2.7.6 (default, Jun 22 2015, 18:00:18)
>     [GCC 4.8.2] on linux2
>     Type "help", "copyright", "credits" or "license" for more information.
>     >>> import sh
>     >>> sh.ls('-l')
>     total 4
>     drwxrwxr-x 6 dojo dojo 4096 Apr 24 22:04 env
>
>     >>> sh.ls('-1')
>     env
>
>     >>>
>     (env)dojo at 4519_n_high:~/sh$
>
> Microsoft's Windows 10 nagware storms live TV weather forecast
> http://www.theregister.co.uk/2016/04/28/windows_10_live_tv/
>
> venv is preferred for Python3
> virtualenv is preferred for Python2
>
> (ana|mini)conda versus virutalenv/venv
>
> from __future__ import print_function
>
> use pytest instead of unittest
> friends don't let friends use unittest
>
> scikit-learn
>
> Oxford, serial, and Harvard commas
> Stunk & White's Elements of Style
> Kernighan & Plauger's The Elements of Programming Style
>
> Copy README.md
> from https://github.com/cohpy/challenge-201604-words/raw/master/README.md
> paste it into ipynb cell.
> Make that cell a markdown cell.
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 1 May 2016 11:02:20 -0400
> From: Eric Floehr <eric at intellovations.com>
> To: "Mailing list for Central Ohio Python User Group (COhPy)"
>         <centraloh at python.org>
> Subject: Re: [CentralOH] focus for numpy/scipy presentations
> Message-ID:
>         <CAJzarMNdTzA1JK72=
> QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Neil,
>
> I am interested in numpy and scipy for image manipulation and analysis and
> would be interested in getting started with feature detection and image
> classification.
>
> Specifically for my timelapse project, I would like to identify features
> like birds, the moon, airplane lights, and of course clouds. I would also
> be interested in grouping sky images into groups automatically. You know
> that there is blue sky and completely overcast, but there are probably
> certain other types of sky and cloud cover that naturally group together
> and it would be neat to be able to identify those clusters.
>
> Don't know if any of that is possible, but that's my thoughts :-).
>
> Thanks!
> Eric
>
>
>
> On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
> wrote:
>
> > At the last cohpy meeting, several people wrote down numpy and/or scipy
> > as desired topics for future presentations.  These are very broad and
> > easily turn into boring overviews of python for matlab people.  Does
> > anyone have requests for a presentation on a specific scipy module,
> > digital signal processing topic, or even an idea for a project that you
> > heard numpy/scipy would be good for but not sure how to get started?
> > _______________________________________________
> > CentralOH mailing list
> > CentralOH at python.org
> > https://mail.python.org/mailman/listinfo/centraloh
> >
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> http://mail.python.org/pipermail/centraloh/attachments/20160501/59ba2847/attachment-0001.html
> >
>
> ------------------------------
>
> Message: 4
> Date: Sun, 1 May 2016 11:15:21 -0400
> From: Bim Walker <bim at digitalbim.com>
> To: "Mailing list for Central Ohio Python User Group (COhPy)"
>         <centraloh at python.org>
> Subject: Re: [CentralOH] focus for numpy/scipy presentations
> Message-ID: <641CA95F-10A3-4478-A7AC-60E9BCBC7DE6 at digitalbim.com>
> Content-Type: text/plain; charset="us-ascii"
>
>
> Following up on what Eric said, I would also be interested in calling
> machine-learning frameworks from scipy, specifically things like Caffe.
>
>
> Bim
>
>
> On May 1, 2016, at 11:02 AM, Eric Floehr <eric at intellovations.com> wrote:
>
> > Neil,
> >
> > I am interested in numpy and scipy for image manipulation and analysis
> and would be interested in getting started with feature detection and image
> classification.
> >
> > Specifically for my timelapse project, I would like to identify features
> like birds, the moon, airplane lights, and of course clouds. I would also
> be interested in grouping sky images into groups automatically. You know
> that there is blue sky and completely overcast, but there are probably
> certain other types of sky and cloud cover that naturally group together
> and it would be neat to be able to identify those clusters.
> >
> > Don't know if any of that is possible, but that's my thoughts :-).
> >
> > Thanks!
> > Eric
> >
> >
> >
> > On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
> wrote:
> > At the last cohpy meeting, several people wrote down numpy and/or scipy
> > as desired topics for future presentations.  These are very broad and
> > easily turn into boring overviews of python for matlab people.  Does
> > anyone have requests for a presentation on a specific scipy module,
> > digital signal processing topic, or even an idea for a project that you
> > heard numpy/scipy would be good for but not sure how to get started?
> > _______________________________________________
> > CentralOH mailing list
> > CentralOH at python.org
> > https://mail.python.org/mailman/listinfo/centraloh
> >
> > _______________________________________________
> > CentralOH mailing list
> > CentralOH at python.org
> > https://mail.python.org/mailman/listinfo/centraloh
>
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> http://mail.python.org/pipermail/centraloh/attachments/20160501/e7c6c054/attachment-0001.html
> >
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
> ------------------------------
>
> End of CentralOH Digest, Vol 109, Issue 1
> *****************************************
>
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From joe at joeshaw.org  Mon May  2 09:14:10 2016
From: joe at joeshaw.org (Joe Shaw)
Date: Mon, 2 May 2016 09:14:10 -0400
Subject: [CentralOH] focus for numpy/scipy presentations
In-Reply-To: <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
References: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
 <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
Message-ID: <CAOxvq7y++JRHtDUBY5XTeT5x_nKWFjZRFYUtemeSzKLy2db9QQ@mail.gmail.com>

Hi,

On a related note, the "new hotness" for feature detection and
classification is deep neural nets, and Google's open-source Tensorflow
project makes these kinds of systems easier to write than ever before.  You
can write them in Python, leveraging numpy.

Check out https://www.tensorflow.org/versions/r0.8/get_started/index.html
for more info.

Joe

On Sun, May 1, 2016 at 11:02 AM, Eric Floehr <eric at intellovations.com>
wrote:

> Neil,
>
> I am interested in numpy and scipy for image manipulation and analysis and
> would be interested in getting started with feature detection and image
> classification.
>
> Specifically for my timelapse project, I would like to identify features
> like birds, the moon, airplane lights, and of course clouds. I would also
> be interested in grouping sky images into groups automatically. You know
> that there is blue sky and completely overcast, but there are probably
> certain other types of sky and cloud cover that naturally group together
> and it would be neat to be able to identify those clusters.
>
> Don't know if any of that is possible, but that's my thoughts :-).
>
> Thanks!
> Eric
>
>
>
> On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
> wrote:
>
>> At the last cohpy meeting, several people wrote down numpy and/or scipy
>> as desired topics for future presentations.  These are very broad and
>> easily turn into boring overviews of python for matlab people.  Does
>> anyone have requests for a presentation on a specific scipy module,
>> digital signal processing topic, or even an idea for a project that you
>> heard numpy/scipy would be good for but not sure how to get started?
>> _______________________________________________
>> CentralOH mailing list
>> CentralOH at python.org
>> https://mail.python.org/mailman/listinfo/centraloh
>>
>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
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From nludban at columbus.rr.com  Mon May  2 13:08:55 2016
From: nludban at columbus.rr.com (Neil Ludban)
Date: Mon, 2 May 2016 13:08:55 -0400
Subject: [CentralOH] focus for numpy/scipy presentations
In-Reply-To: <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
References: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
 <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
Message-ID: <20160502130855.6f8add90274d316a48aa57cc@columbus.rr.com>

Eric,

I think this would make a good intro presentation:
- Load an image from a file into a numpy matrix
- Display a matrix as an image
- Basic matrix operations (select a region of interest, convert to grayscale)
- Convolution (smoothing and edge detection filters)
- Correlation (finding motion between successive images)

As others have pointed out, OpenCV already does this, but for these
functions it's really just an optimized implementation of simple
equations (actually, variations on one equation).  You can still
benefit from using numpy to prepare the inputs and to reduce the
outputs.  Machine learning on megapixels of input is computationally
expensive, it is common to preprocess the image in order to reduce
the amount of time needed.

Are your timelapse images available online, or could you post a small
number of representative images for me to experiment with?


On Sun, 1 May 2016 11:02:20 -0400
Eric Floehr <eric at intellovations.com> wrote:
> Neil,
> 
> I am interested in numpy and scipy for image manipulation and analysis and
> would be interested in getting started with feature detection and image
> classification.
> 
> Specifically for my timelapse project, I would like to identify features
> like birds, the moon, airplane lights, and of course clouds. I would also
> be interested in grouping sky images into groups automatically. You know
> that there is blue sky and completely overcast, but there are probably
> certain other types of sky and cloud cover that naturally group together
> and it would be neat to be able to identify those clusters.
> 
> Don't know if any of that is possible, but that's my thoughts :-).
> 
> Thanks!
> Eric
> 
> 
> 
> On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
> wrote:
> 
> > At the last cohpy meeting, several people wrote down numpy and/or scipy
> > as desired topics for future presentations.  These are very broad and
> > easily turn into boring overviews of python for matlab people.  Does
> > anyone have requests for a presentation on a specific scipy module,
> > digital signal processing topic, or even an idea for a project that you
> > heard numpy/scipy would be good for but not sure how to get started?
> > _______________________________________________
> > CentralOH mailing list
> > CentralOH at python.org
> > https://mail.python.org/mailman/listinfo/centraloh
> >

From winningham at gmail.com  Mon May  2 13:19:11 2016
From: winningham at gmail.com (Thomas Winningham)
Date: Mon, 2 May 2016 13:19:11 -0400
Subject: [CentralOH] focus for numpy/scipy presentations
In-Reply-To: <20160502130855.6f8add90274d316a48aa57cc@columbus.rr.com>
References: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
 <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
 <20160502130855.6f8add90274d316a48aa57cc@columbus.rr.com>
Message-ID: <CAJShLf-N6TSxNVp5qo0D5gbsHQYZc=_VruOfLoe3s0wSt9W6XA@mail.gmail.com>

Just wanted to add a note about a thing I was playing with.

Some of the RNN stuff is built around CUDA, but I happened to be on a
machine that didn't have an NVidia card. I wanted to play around with this
"style transfer" stuff. This is sort of a RNN in reverse like Deep Dream
and such, but with regular photos producing a non-LSD like result.

Anyway, I found this library, and after playing with a Docker image that
had an old version of Caffe, I managed to update all of that and get it
working.

https://github.com/fzliu/style-transfer

Mostly all I did was run the demo software that comes with it, but it did
work with just the CPU and no GPU, and could be a fund Saturday afternoon
for anyone on the list to play around with, or send freaky images to
friends or make a new profile picture (heh).

-t

On Mon, May 2, 2016 at 1:08 PM, Neil Ludban <nludban at columbus.rr.com> wrote:

> Eric,
>
> I think this would make a good intro presentation:
> - Load an image from a file into a numpy matrix
> - Display a matrix as an image
> - Basic matrix operations (select a region of interest, convert to
> grayscale)
> - Convolution (smoothing and edge detection filters)
> - Correlation (finding motion between successive images)
>
> As others have pointed out, OpenCV already does this, but for these
> functions it's really just an optimized implementation of simple
> equations (actually, variations on one equation).  You can still
> benefit from using numpy to prepare the inputs and to reduce the
> outputs.  Machine learning on megapixels of input is computationally
> expensive, it is common to preprocess the image in order to reduce
> the amount of time needed.
>
> Are your timelapse images available online, or could you post a small
> number of representative images for me to experiment with?
>
>
> On Sun, 1 May 2016 11:02:20 -0400
> Eric Floehr <eric at intellovations.com> wrote:
> > Neil,
> >
> > I am interested in numpy and scipy for image manipulation and analysis
> and
> > would be interested in getting started with feature detection and image
> > classification.
> >
> > Specifically for my timelapse project, I would like to identify features
> > like birds, the moon, airplane lights, and of course clouds. I would also
> > be interested in grouping sky images into groups automatically. You know
> > that there is blue sky and completely overcast, but there are probably
> > certain other types of sky and cloud cover that naturally group together
> > and it would be neat to be able to identify those clusters.
> >
> > Don't know if any of that is possible, but that's my thoughts :-).
> >
> > Thanks!
> > Eric
> >
> >
> >
> > On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
> > wrote:
> >
> > > At the last cohpy meeting, several people wrote down numpy and/or scipy
> > > as desired topics for future presentations.  These are very broad and
> > > easily turn into boring overviews of python for matlab people.  Does
> > > anyone have requests for a presentation on a specific scipy module,
> > > digital signal processing topic, or even an idea for a project that you
> > > heard numpy/scipy would be good for but not sure how to get started?
> > > _______________________________________________
> > > CentralOH mailing list
> > > CentralOH at python.org
> > > https://mail.python.org/mailman/listinfo/centraloh
> > >
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From jaydclouse at gmail.com  Wed May  4 09:30:03 2016
From: jaydclouse at gmail.com (Jay Clouse)
Date: Wed, 4 May 2016 09:30:03 -0400
Subject: [CentralOH] Startup Weekend: Smart City Edition May 13-15 (Discount
 inside)
Message-ID: <CAEAJ9QgTVKpwJPqc4+Zam6dP7C78u15pmTkwOjkTy4YTnNadmQ@mail.gmail.com>

Hey guys,

Wanted to shoot you all a note that Startup Weekend is rolling around again
next weekend, May 13-15 at Rev1 Ventures. This event is piggy backing on
the city's efforts to win a $40M+ grant from the USDOT for "Smart City"
initiatives.

Most of you are probably familiar with the event, so I'll leave the
boilerplate for the end. Would love to have some of you talented folks come
work on some big ideas. If you use the promo code PYTHON you will save 50%.
<https://www.eventbrite.com/e/startup-weekend-columbus-smart-city-edition-tickets-24274773501?discount=PYTHON>

Full event details/people involved seen at www.swcbus.com. Hope to see you
there!
--

All Startup Weekend events follow the same basic model: Anyone is welcome
to pitch their startup idea and receive feedback from their peers. Teams
organically form around the top ideas (as determined by popular vote) and
then it's a 54-hour frenzy of business model creation, coding, UX/design,
and market validation. The weekend culminates with presentations in front
of local entrepreneurial leaders with another opportunity for feedback and
to win prizes.

This event is specifically focused on Smart City topics, meaning that every
idea pitched and worked on will need to pertain to topics such as:

   - Transportation
   - Infrastructure
   - Internet Accessibility
   - Sustainability
   - City Planning
   - Water
   - Energy
   - Urban Agriculture
   - Waste/Recycling
   - ?or any other Smart City vertical!


*Jay Clouse *--
jayclouse.com || *+1.419.852.9976*
Tixers <http://www.tixers.com/> || Chief Operating Officer
Create Columbus <http://createcolumb.us/>* || *Commissioner
Startup Weekend <http://swcbus.com> || Facilitator & Organizer
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From kurtis.mullins at gmail.com  Wed May  4 11:42:05 2016
From: kurtis.mullins at gmail.com (Kurtis Mullins)
Date: Wed, 04 May 2016 15:42:05 +0000
Subject: [CentralOH] Startup Weekend: Smart City Edition May 13-15
 (Discount inside)
In-Reply-To: <CAEAJ9QgTVKpwJPqc4+Zam6dP7C78u15pmTkwOjkTy4YTnNadmQ@mail.gmail.com>
References: <CAEAJ9QgTVKpwJPqc4+Zam6dP7C78u15pmTkwOjkTy4YTnNadmQ@mail.gmail.com>
Message-ID: <CAPbEHsc3dLqeTLDntW8+v9XRhc=LpYauX=35+G2WpV0m2frJPA@mail.gmail.com>

Hey,

I'm a little confused. You have to pay to attend this event?

I've attended similar events in places like San Francisco and Atlanta, but
they were completely paid for by the sponsoring organizations.

It benefited the investors because they got the first chance at any
products/ideas coming out. It also benefitted the sponsors because their
name was seen (advertising/promotion).

Thanks!
-Kurtis Mullins

On Wed, May 4, 2016 at 11:34 AM Jay Clouse <jaydclouse at gmail.com> wrote:

> Hey guys,
>
> Wanted to shoot you all a note that Startup Weekend is rolling around
> again next weekend, May 13-15 at Rev1 Ventures. This event is piggy backing
> on the city's efforts to win a $40M+ grant from the USDOT for "Smart City"
> initiatives.
>
> Most of you are probably familiar with the event, so I'll leave the
> boilerplate for the end. Would love to have some of you talented folks come
> work on some big ideas. If you use the promo code PYTHON you will save
> 50%.
> <https://www.eventbrite.com/e/startup-weekend-columbus-smart-city-edition-tickets-24274773501?discount=PYTHON>
>
> Full event details/people involved seen at www.swcbus.com. Hope to see
> you there!
> --
>
> All Startup Weekend events follow the same basic model: Anyone is welcome
> to pitch their startup idea and receive feedback from their peers. Teams
> organically form around the top ideas (as determined by popular vote) and
> then it's a 54-hour frenzy of business model creation, coding, UX/design,
> and market validation. The weekend culminates with presentations in front
> of local entrepreneurial leaders with another opportunity for feedback and
> to win prizes.
>
> This event is specifically focused on Smart City topics, meaning that
> every idea pitched and worked on will need to pertain to topics such as:
>
>    - Transportation
>    - Infrastructure
>    - Internet Accessibility
>    - Sustainability
>    - City Planning
>    - Water
>    - Energy
>    - Urban Agriculture
>    - Waste/Recycling
>    - ?or any other Smart City vertical!
>
>
> *Jay Clouse *--
> jayclouse.com || *+1.419.852.9976*
> Tixers <http://www.tixers.com/> || Chief Operating Officer
> Create Columbus <http://createcolumb.us/>* || *Commissioner
> Startup Weekend <http://swcbus.com> || Facilitator & Organizer
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From jep200404 at columbus.rr.com  Wed May  4 13:39:51 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Wed, 4 May 2016 13:39:51 -0400
Subject: [CentralOH] 2016-05-04 Yats Napkin Scribbles: best first
 programming language: python; leading zero; set bourne v bash; emacs v vi;
 Meta key woot shirts cerberus, FriSatSun
Message-ID: <20160504133951.5ffb7792.jep200404@columbus.rr.com>

What is best first programming language to learn?

    first answer: shell

leading zero for numerical comparison

set

Bourne v bash

bash

    emacs is default
        ^R history
    vi is supported, but is not default

How to use Meta key through ssh?

woot shirts
wp:Cerberus

last week of month that has Friday, Saturday, and Sunday
    What day of the week do weeks start on?

From hippieben at gmail.com  Wed May  4 13:40:33 2016
From: hippieben at gmail.com (Ben Sebastian)
Date: Wed, 04 May 2016 17:40:33 +0000
Subject: [CentralOH] 2016-05-04 Yats Napkin Scribbles: best first
 programming language: python; leading zero; set bourne v bash; emacs v vi;
 Meta key woot shirts cerberus, FriSatSun
In-Reply-To: <20160504133951.5ffb7792.jep200404@columbus.rr.com>
References: <20160504133951.5ffb7792.jep200404@columbus.rr.com>
Message-ID: <CAPkR7K+ji1mDJORXeCjo2DnFR=P1c++etOb1pwL+n99OwKsMOA@mail.gmail.com>

On Wed, May 4, 2016, 1:40 PM <jep200404 at columbus.rr.com> wrote:

> What is best first programming language to learn?
>
>     first answer: shell
>
> leading zero for numerical comparison
>
> set
>
> Bourne v bash
>
> bash
>
>     emacs is default
>         ^R history
>     vi is supported, but is not default
>
> How to use Meta key through ssh?
>
> woot shirts
> wp:Cerberus
>
> last week of month that has Friday, Saturday, and Sunday
>     What day of the week do weeks start on?
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From jep200404 at columbus.rr.com  Wed May  4 19:46:41 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Wed, 4 May 2016 19:46:41 -0400
Subject: [CentralOH] =?utf-8?q?2015-04-24_=E9=81=93=E5=A0=B4_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz8gOHBpbm8uY2MgcGVwOCBjb25zdGFudHMgcmVmYWN0?=
 =?utf-8?q?oring?=
Message-ID: <20160504194641.7c6920d6.jep200404@columbus.rr.com>

We have been having enough people the last few weeks that someone asked when we
are moving to a bigger place.

8pino.cc

https://www.python.org/dev/peps/pep-0008/#constants

refactor some code. 
    He did most of typing.
    I talked him through using vim.

From pstryjew at columbus.rr.com  Thu May  5 09:16:02 2016
From: pstryjew at columbus.rr.com (Peter Stryjewski)
Date: Thu, 5 May 2016 09:16:02 -0400
Subject: [CentralOH] O'Reilly Deal of the Day - Python Playground
Message-ID: <f1384165-4201-fe7c-9a43-52c86653eee7@columbus.rr.com>

O'Reilly Books Deal of the Day

Python Playground (Geek Projects for the Curious Programmer)

http://shop.oreilly.com/product/9781593276041.do?code=DEAL

50% off through 8AM (EDT) 5/6/16



From jep200404 at columbus.rr.com  Sat May  7 14:00:54 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sat, 7 May 2016 14:00:54 -0400
Subject: [CentralOH] =?utf-8?q?2015-05-06_=E9=81=93=E5=A0=B4_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz8gJSBhcnQgZXBoZXN1cyBiYWQgY29kZSBib3R1bGlz?=
 =?utf-8?q?m_brokers_feathers_gzip_bzip2_xz_2v3_scotts_v_eu_dark_shoals_mo?=
 =?utf-8?q?dels_r_fabrice_think_=27and=27_v_if_podcasts_ipywidgets_color_d?=
 =?utf-8?q?ale_carnegie_pythonista_swift_words_django_hot_club_tis100_fact?=
 =?utf-8?q?orio_dd_al_sweigart_xrandr_bengal_flask_websockets?=
Message-ID: <20160507140054.5998e4be.jep200404@columbus.rr.com>

predict the output
3.25 % 3.5, 3.25 % 1, 3.25 % -1, -.25 % 3.5, -.25 % -3.5, .25 % -3.5, .25 % 3.5

The Jubilee Museum
Catholic religious art
Grubb St
http://jubileemuseum.org/

wp:House of the Virgin Mary
wp:Ephesus
wp:Rhodes
wp:Sea of Marmara

p: prefix means Wikipedia
To get good answers, consider following the advice in the links below.
http://catb.org/~esr/faqs/smart-questions.html
http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html

trackalicious
spamalicious
The Complete Guide to Approaching Your Dev Team When They Write Bad Code
https://smartbear.com/ppc/ebooks/complete-guide-to-approaching-your-dev-team/?sr=cohpydojo_trackalicious_spamalicious

Botulism death tied to Lancaster church potluck
http://www.dispatch.com/content/stories/local/2015/04/22/Updated-botulism-cases.html
http://www.dispatch.com/content/stories/local/2015/04/21/botulism-lancaster.html

wp:Interactive Brokers
http://blog.codinghorror.com/heres-the-programming-game-you-never-asked-for/

wp:The Four Feathers (disambiguation)

Played with gzip, bzip2, and xz comressing image of a new flash drive.

compression
bzip2 and xz were similar, with bzip2 being the best.
gzip was worst, yielding a file about 2.5 times bigger than bzip2 and xz.

speed
gzip was the fastest by far. It was faster than reading flash drive.
xz was the slowest by far, about 2.5 times slower than bzip2.
bzip2 was almost as fast as just reading the flash drive.

    [root at 4519_n_high 20160502-sandisk-cruzer-glide-16gb]# ll *
    bzip2:
    total 10944
    -rwxr-xr--. 1 root root      307 Dec 14 21:56 foo
    -rw-r--r--. 1 root root     1561 May  2 16:09 log
    -rw-r--r--. 1 root root 11183992 May  2 15:38 sdb.1.bz2
    -rw-r--r--. 1 root root      132 May  2 16:00 sdb.bz2.bunzip2.SHA1SUM
    -rw-r--r--. 1 root root      132 May  2 16:00 sdb.bz2.SHA1SUM
    -rw-r--r--. 1 root root      132 May  2 16:00 sdb.SHA1SUM

    gzip:
    total 25908
    -rwxr-xr--. 1 root root      301 May  2 16:44 foo
    -rw-r--r--. 1 root root     1587 May  2 21:06 log
    -rw-r--r--. 1 root root 26506407 May  2 17:53 sdb.1.gz
    -rw-r--r--. 1 root root      132 May  2 18:12 sdb.gz.gunzip.SHA1SUM
    -rw-r--r--. 1 root root      132 May  2 18:12 sdb.gz.SHA1SUM
    -rw-r--r--. 1 root root      132 May  2 18:12 sdb.SHA1SUM

    xz:
    total 11684
    -rwxr-xr--. 1 root root      306 May  2 11:56 foo
    -rw-r--r--. 1 root root     1545 May  2 17:44 log
    -rw-r--r--. 1 root root 11943768 May  2 16:36 sdb.1.xz
    -rw-r--r--. 1 root root      132 May  2 17:30 sdb.SHA1SUM
    -rw-r--r--. 1 root root      132 May  2 17:30 sdb.xz.SHA1SUM
    -rw-r--r--. 1 root root      132 May  2 17:30 sdb.xz.unxz.SHA1SUM
    [root at 4519_n_high 20160502-sandisk-cruzer-glide-16gb]# head -n 1000 */foo
    ==> bzip2/foo <==
    #!/bin/bash
    drive=sdb
    fdisk -l /dev/"$drive"
    for i in `seq 3`; do
        date
        time dd if=/dev/"$drive" bs=1M |
        tee "$drive".$i >(sha1sum >>"$drive".SHA1SUM) |
        bzip2 |
        tee "$drive".$i.bz2 >(sha1sum >>"$drive".bz2.SHA1SUM) |
        bunzip2 |
        sha1sum >>"$drive".bz2.bunzip2.SHA1SUM
        date
    done

    ==> gzip/foo <==
    #!/bin/bash
    drive=sdb
    fdisk -l /dev/"$drive"
    for i in `seq 3`; do
        date
        time dd if=/dev/"$drive" bs=1M |
        tee "$drive".$i >(sha1sum >>"$drive".SHA1SUM) |
        gzip |
        tee "$drive".$i.gz >(sha1sum >>"$drive".gz.SHA1SUM) |
        gunzip |
        sha1sum >>"$drive".gz.gunzip.SHA1SUM
        date
    done

    ==> xz/foo <==
    #!/bin/bash
    drive=sdb
    fdisk -l /dev/"$drive"
    for i in `seq 3`; do
        date
        time dd if=/dev/"$drive" bs=1M |
        tee "$drive".$i >(sha1sum >>"$drive".SHA1SUM) |
        xz |
        tee "$drive".$i.xz >(sha1sum >>"$drive".xz.SHA1SUM) |
        xz --decompress |
        sha1sum >>"$drive".xz.unxz.SHA1SUM
        date
    done
    [root at 4519_n_high 20160502-sandisk-cruzer-glide-16gb]# head -n 1000 */log
    ==> bzip2/log <==
    [root at 4519_n_high bzip2]# ./foo

    Disk /dev/sdb: 15.5 GB, 15522070528 bytes, 30316544 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x00000000

       Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1              32    30316543    15158256    c  W95 FAT32 (LBA)
    Mon May  2 15:27:56 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 641.663 s, 24.2 MB/s

    real    10m58.786s
    user    5m15.281s
    sys     1m12.339s
    Mon May  2 15:38:54 EDT 2016
    Mon May  2 15:38:54 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 641.972 s, 24.2 MB/s

    real    10m59.356s
    user    5m14.247s
    sys     1m13.143s
    Mon May  2 15:49:54 EDT 2016
    Mon May  2 15:49:54 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 641.799 s, 24.2 MB/s

    real    10m59.113s
    user    5m15.332s
    sys     1m12.831s
    Mon May  2 16:00:53 EDT 2016
    [root at 4519_n_high bzip2]# head *SUM
    ==> sdb.bz2.bunzip2.SHA1SUM <==
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -

    ==> sdb.bz2.SHA1SUM <==
    399e5381c9117254f85d5c4a7cc724ed96838439  -
    399e5381c9117254f85d5c4a7cc724ed96838439  -
    399e5381c9117254f85d5c4a7cc724ed96838439  -

    ==> sdb.SHA1SUM <==
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    [root at 4519_n_high bzip2]#

    ==> gzip/log <==
    [root at 4519_n_high gzip]# ./foo

    Disk /dev/sdb: 15.5 GB, 15522070528 bytes, 30316544 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x00000000

       Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1              32    30316543    15158256    c  W95 FAT32 (LBA)
    Mon May  2 17:44:19 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 558.157 s, 27.8 MB/s

    real    9m18.361s
    user    4m22.990s
    sys     1m1.818s
    Mon May  2 17:53:37 EDT 2016
    Mon May  2 17:53:37 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 558.492 s, 27.8 MB/s

    real    9m18.696s
    user    4m23.604s
    sys     1m2.255s
    Mon May  2 18:02:56 EDT 2016
    Mon May  2 18:02:56 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 557.125 s, 27.9 MB/s

    real    9m17.331s
    user    4m23.001s
    sys     1m1.616s
    Mon May  2 18:12:13 EDT 2016
    [root at 4519_n_high gzip]# head *SUM
    ==> sdb.gz.gunzip.SHA1SUM <==
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -

    ==> sdb.gz.SHA1SUM <==
    8d41e87c318a18358a75594d99c26b3408133a65  -
    1772d2cfad78c4f673914087f6a2fac57bc6f059  -
    bd2ec5bb1e7f70ff7008d184f938e078c3e4b120  -

    ==> sdb.SHA1SUM <==
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    You have mail in /var/spool/mail/root
    [root at 4519_n_high gzip]#

    ==> xz/log <==
    [root at 4519_n_high xz]# ./foo

    Disk /dev/sdb: 15.5 GB, 15522070528 bytes, 30316544 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x00000000

       Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1              32    30316543    15158256    c  W95 FAT32 (LBA)
    Mon May  2 16:09:48 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 1622.62 s, 9.6 MB/s

    real    27m2.833s
    user    24m24.162s
    sys     1m20.081s
    Mon May  2 16:36:51 EDT 2016
    Mon May  2 16:36:51 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 1620.79 s, 9.6 MB/s

    real    27m1.045s
    user    24m21.896s
    sys     1m20.101s
    Mon May  2 17:03:52 EDT 2016
    Mon May  2 17:03:52 EDT 2016
    14803+0 records in
    14803+0 records out
    15522070528 bytes (16 GB) copied, 1619.36 s, 9.6 MB/s

    real    26m59.587s
    user    24m21.973s
    sys     1m18.129s
    Mon May  2 17:30:52 EDT 2016
    [root at 4519_n_high xz]# head *SUM
    ==> sdb.SHA1SUM <==
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -

    ==> sdb.xz.SHA1SUM <==
    b4affe02c463e3bcc010a974ec580713d1bdb7a0  -
    b4affe02c463e3bcc010a974ec580713d1bdb7a0  -
    b4affe02c463e3bcc010a974ec580713d1bdb7a0  -

    ==> sdb.xz.unxz.SHA1SUM <==
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    990aa4b440fe93a022c02e5f86298be7e36f06d6  -
    [root at 4519_n_high xz]#

Should I use Python 2 or Python 3 for my development activity?
https://wiki.python.org/moin/Python2orPython3

U.K. Voters Fear Scottish Independence More Than Leaving EU
http://english.chosun.com/site/data/html_dir/2016/05/04/2016050400619.html

wp:Muscle Shoals
wp:Black?Scholes

Models.Behaving.Badly
https://telecomseim.blogspot.sg/2015/11/dysdatia-data-blindness-and-you.html

wp:R (programming language)
^R is a bashism _not_ restricted to emacs mode.

wp:Fabrice Bellard
wp:Better Portable Graphics
Never The Same Color is not dead http://bellard.org/dvbt/
http://www0.us.ioccc.org/2000/bellard.hint
Central Ohio Obfuscated Python Code Contest

wp:Don't Make Me Think
web.standards.solutions friendsofed

https://www.eff.org/deeplinks/2016/04/rule-41-little-known-committee-proposes-grant-new-hacking-powers-government

max_x == 51. and print('gc1', i)
if max_x == 51.:
    print('gc1', i)

jupyter released ipywidgets 5.0

podcasts
    podcast.__init__ http://podcastinit.com/
    talk python to me https://talkpython.fm/
        python & enterprise
            myths
        head of python visual studio project

    scrapy
    Miguel http://blog.miguelgrinberg.com/
        says flask is scalable
        http://blog.miguelgrinberg.com/post/flask-at-scale-tutorial-at-pycon-2016-in-portland
        websockets
        socket.io
    turbogears
    read the docs
    pep process, discussing how some of them worked
    functional programming from a couple of data guys Barry

color is important

how to remember names

wp:Dale Carnegie
    wp:How to Win Friends and Influence People
    Dale Carnegie Course in Effective Speaking and Human Relations

ios
    pythonista
    wp:Swift (programming language)

count words challenge
    define words:
        each letter is a word
        omit vowels, except for words that have no consonants
        each syllable is a word
            how to
        words are those in unix dictionary
        words are those in online dictionary

Django
Hot Club

wp:TIS-100
wp:Zachtronics Industries
wp:factorio
http://inventwithpython.com/
likes Automate the Boring Stuff with Python
asdf at asdf.com

dd examples

    dd if=/dev/sda of=/dev/sdb ;# copy first hard drive to second hard drive
    dd if=/dev/sda of=sda.img.backup ;# copy first hard drive to file
    dd if=/dev/zero of=/dev/sda ;# fill first hard drive with zeroes
    dd if=/dev/random of=/dev/sda ;# fill first hard drive with random bytes

    dd if=/dev/sdb bs=1M |
    xxd -g 1 -u |
    awk '{new=substr($0,10);if (new!=old) {print $0;elipsis=0} else if (!elipsis) {print "...";elipsis=1};old=new}' |
    less

    dd if=/dev/zero bs=1M count=1k of=foo.img
    fdisk foo.raw
    losetup -o `echo 63 '*' 512 | bc` -f foo.raw
    mkfs.ext4 /dev/loop0
    mount -r /dev/loop0 mnt
    umount /dev/loop0
    losetup -d /dev/loop0

standing desks
    triple monitors
    rotate monitors, so some are much taller than wide
    xrandr: does much, but need to rtfm AND experiment

        https://mail.python.org/pipermail/centraloh/2012-May/001270.html
        https://mail.python.org/pipermail/centraloh/2012-July/001336.html

wp:Bengal cat

flask websockets
    http://www.matthieuamiguet.ch/blog/synchronize-clients-flask-application-websockets

From jep200404 at columbus.rr.com  Sun May  8 18:36:38 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sun, 8 May 2016 18:36:38 -0400
Subject: [CentralOH] How To Show Incremental Changes Between Cells in
 Jupyter Notebook?
Message-ID: <20160508183638.384911c5.jep200404@columbus.rr.com>

I need a better way to show differences between Jupyter Notebook cells
to show incremental improvements while refactoring.
What better ways can you think of?
How would you do it?

I have been refactoring in Jupyter Notebook for others to learn from.
I start with some small code in a cell,
copy it into a new cell and change something.
There are many small changes, so there are many cells.
When looking back, it would be nice to see what the differences are
without relying on one's eyeballs to notice all the changes.

Explore:
http://nbviewer.jupyter.org/url/colug.net/python/dojo/20160429/dojo-20160429-2016-Mar-COhPy_Challenge_Rough-20160507-2148.ipynb

Something that is not mentioned in the bottom cell
is that it would be nice for it to work in MS Windows
and Apple as well as Linux.

From jep200404 at columbus.rr.com  Sun May  8 19:42:29 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sun, 8 May 2016 19:42:29 -0400
Subject: [CentralOH] 2016-05-11 11:30 Wednesday Python Lunch at Cafe Istanbul
Message-ID: <20160508194229.3a12d497.jep200404@columbus.rr.com>

Wednesday Python Lunch at Cafe Istanbul

May 11, 2016, 11:30 a.m.

Cafe Istanbul
3983 Worth Ave. Columbus, OH 43219

We'll be meeting for good food and good company.
Join us to talk Python, programming, or anything else!

Set cohpy.org for links.

From eric at intellovations.com  Sun May  8 20:27:36 2016
From: eric at intellovations.com (Eric Floehr)
Date: Sun, 8 May 2016 20:27:36 -0400
Subject: [CentralOH] 2016-05-11 11:30 Wednesday Python Lunch at Cafe
 Istanbul
In-Reply-To: <20160508194229.3a12d497.jep200404@columbus.rr.com>
References: <20160508194229.3a12d497.jep200404@columbus.rr.com>
Message-ID: <CAJzarMPcvOV4TK9TmSa33jX9euFV4WyhXrSfHE0gQvYE=0BPXA@mail.gmail.com>

RSVP Here:
http://www.meetup.com/Central-Ohio-Python-Users-Group/events/230977736/


On Sun, May 8, 2016 at 7:42 PM, <jep200404 at columbus.rr.com> wrote:

> Wednesday Python Lunch at Cafe Istanbul
>
> May 11, 2016, 11:30 a.m.
>
> Cafe Istanbul
> 3983 Worth Ave. Columbus, OH 43219
>
> We'll be meeting for good food and good company.
> Join us to talk Python, programming, or anything else!
>
> Set cohpy.org for links.
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From info at pyohio.org  Mon May  9 10:44:53 2016
From: info at pyohio.org (=?utf-8?Q?PyOhio=2C=20Inc.?=)
Date: Mon, 9 May 2016 14:44:53 +0000
Subject: [CentralOH] =?utf-8?q?PyOhio_2016_-_Registration_Open_Now_-_CFP_O?=
 =?utf-8?b?cGVuIC0gU2Vla2luZyBTcG9uc29yc8Kg8J+QjcKg8J+Ygw==?=
Message-ID: <8c9245b985e483ce2777296fbc26f2dea68.20160509144425@mail96.suw17.mcsv.net>

PyOhio registration is open now!
View this email in your browser (http://us3.campaign-archive2.com/?u=8c9245b985e483ce2777296fb&id=eea1c28a75&e=c26f2dea68)


** TL;DR version: Registration is open. We still need speaker submissions. We still need sponsors.
------------------------------------------------------------


**
PyOhio 2016 Registration is Open!
------------------------------------------------------------
PyOhio is a free event but attendees must register through Eventbrite. Registration is now officially open and you can register here:

Register for PyOhio 2016 (http://pyohio.us3.list-manage.com/track/click?u=8c9245b985e483ce2777296fb&id=721b701a64&e=c26f2dea68)
Please note that there are ticket+t-shirt and ticket-only options. If you have already registered and would like to add a t-shirt, please return tho the link above and checkout with the t-shirt option.


**
PyOhio 2016 CFP Open until May 15
------------------------------------------------------------
PyOhio invites all interested people to submit proposals for scheduled talks, tutorials, and panels. All topics of interest to Python programmers will be considered. Presentation talk slots are 40-minutes or 20-minutes (plus short Q&A time.) Tutorial slots are 110 minutes long.


**
Who Should Submit a Proposal?
------------------------------------------------------------
You. Your friends. Your friends' friends. Anyone with any level of Python knowledge is a candidate for a great topic at this conference. As we get attendees of all kinds, we need speakers of all kinds. In particular, we welcome submissions from first-time speakers!


**
Apply by May 15
------------------------------------------------------------
The proposal deadline is May 15 but the earlier you submit, the better! Our reviewers will provide feedback as they review proposals. The earlier you submit your proposals, the more time you have to get?and respond to?feedback. If you have any questions, reply to this email or ask us on Twitter.

Details: http://pyohio.us3.list-manage.com/track/click?u=8c9245b985e483ce2777296fb&id=e749222640&e=c26f2dea68



** Sponsors
------------------------------------------------------------
PyOhio is a FREE event and relies on the generosity of sponsors to keep it that way. If you know of any organizations that wish to support PyOhio, please have them visit our Sponsor Prospectus (http://pyohio.us3.list-manage.com/track/click?u=8c9245b985e483ce2777296fb&id=2e834e2483&e=c26f2dea68) and then Apply to be a Sponsor (http://pyohio.us3.list-manage.com/track/click?u=8c9245b985e483ce2777296fb&id=e91f6e8ec7&e=c26f2dea68) or reply to this email with any questions.


** PyOhio Basics
------------------------------------------------------------
PyOhio 2016 is
Sat July 30 - Sun July 31
at the Ohio Union in Columbus, OH

Hotel info TBA

============================================================
** (http://pyohio.us3.list-manage.com/track/click?u=8c9245b985e483ce2777296fb&id=6b0ca4cc04&e=c26f2dea68)
** (http://pyohio.us3.list-manage1.com/track/click?u=8c9245b985e483ce2777296fb&id=373e0149fd&e=c26f2dea68)
** (http://pyohio.us3.list-manage1.com/track/click?u=8c9245b985e483ce2777296fb&id=753b5413e0&e=c26f2dea68)

This email was sent to centraloh at python.org (mailto:centraloh at python.org)
why did I get this? (http://pyohio.us3.list-manage.com/about?u=8c9245b985e483ce2777296fb&id=ebb557184f&e=c26f2dea68&c=eea1c28a75)     unsubscribe from this list (http://pyohio.us3.list-manage1.com/unsubscribe?u=8c9245b985e483ce2777296fb&id=ebb557184f&e=c26f2dea68&c=eea1c28a75)     update subscription preferences (http://pyohio.us3.list-manage1.com/profile?u=8c9245b985e483ce2777296fb&id=ebb557184f&e=c26f2dea68)
PyOhio, Inc. . 79 Bohyer Avenue, Pataskala, OH, United States . Columbus, Oh 43224 . USA

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From eric at intellovations.com  Mon May  9 20:42:11 2016
From: eric at intellovations.com (Eric Floehr)
Date: Mon, 9 May 2016 20:42:11 -0400
Subject: [CentralOH] focus for numpy/scipy presentations
In-Reply-To: <20160502130855.6f8add90274d316a48aa57cc@columbus.rr.com>
References: <20160430182741.2532ba807c2def625e3f9544@columbus.rr.com>
 <CAJzarMNdTzA1JK72=QTtSn6O4BgtHguBVyqwjjmh48KDtsW9jw@mail.gmail.com>
 <20160502130855.6f8add90274d316a48aa57cc@columbus.rr.com>
Message-ID: <CAJzarMPKub54APEv7fbLyeMA7-goT9-cb-RKpon0SbtW7G1yNw@mail.gmail.com>

Neil,

I have two image sets available. The first is my entire first version of my
timelapse, which was a shot every minute from a 640x480 webcam. It is 9.1GB
compressed and is available here:

https://dl.dropboxusercontent.com/u/322193/pyohio2012/talk/webcam_pictures.tgz

I also have a single day available that contains a lot of bird images. Here
is an image I made by stacking and taking the darkest value of each pixel
for the day, then doing some white balancing:

https://twitter.com/ForecastWatch/status/568131899929051136

Here is the archive of pictures for that day, which is about 2.1GB
compressed:

https://www.dropbox.com/s/m4ggawa25bfqq2q/day_2014_12_19.tgz?dl=0

Will this work for you?

Thanks!
Eric




On Mon, May 2, 2016 at 1:08 PM, Neil Ludban <nludban at columbus.rr.com> wrote:

> Eric,
>
> I think this would make a good intro presentation:
> - Load an image from a file into a numpy matrix
> - Display a matrix as an image
> - Basic matrix operations (select a region of interest, convert to
> grayscale)
> - Convolution (smoothing and edge detection filters)
> - Correlation (finding motion between successive images)
>
> As others have pointed out, OpenCV already does this, but for these
> functions it's really just an optimized implementation of simple
> equations (actually, variations on one equation).  You can still
> benefit from using numpy to prepare the inputs and to reduce the
> outputs.  Machine learning on megapixels of input is computationally
> expensive, it is common to preprocess the image in order to reduce
> the amount of time needed.
>
> Are your timelapse images available online, or could you post a small
> number of representative images for me to experiment with?
>
>
> On Sun, 1 May 2016 11:02:20 -0400
> Eric Floehr <eric at intellovations.com> wrote:
> > Neil,
> >
> > I am interested in numpy and scipy for image manipulation and analysis
> and
> > would be interested in getting started with feature detection and image
> > classification.
> >
> > Specifically for my timelapse project, I would like to identify features
> > like birds, the moon, airplane lights, and of course clouds. I would also
> > be interested in grouping sky images into groups automatically. You know
> > that there is blue sky and completely overcast, but there are probably
> > certain other types of sky and cloud cover that naturally group together
> > and it would be neat to be able to identify those clusters.
> >
> > Don't know if any of that is possible, but that's my thoughts :-).
> >
> > Thanks!
> > Eric
> >
> >
> >
> > On Sat, Apr 30, 2016 at 6:27 PM, Neil Ludban <nludban at columbus.rr.com>
> > wrote:
> >
> > > At the last cohpy meeting, several people wrote down numpy and/or scipy
> > > as desired topics for future presentations.  These are very broad and
> > > easily turn into boring overviews of python for matlab people.  Does
> > > anyone have requests for a presentation on a specific scipy module,
> > > digital signal processing topic, or even an idea for a project that you
> > > heard numpy/scipy would be good for but not sure how to get started?
> > > _______________________________________________
> > > CentralOH mailing list
> > > CentralOH at python.org
> > > https://mail.python.org/mailman/listinfo/centraloh
> > >
>
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From brian.costlow at gmail.com  Tue May 10 11:02:18 2016
From: brian.costlow at gmail.com (Brian Costlow)
Date: Tue, 10 May 2016 11:02:18 -0400
Subject: [CentralOH] Facebook's internal AI/ML framework built in Python
Message-ID: <CACLJ_dEu4UWSEa5=G+E-m7vUhiiVgXRGvoeaoBcxg5XHeKx_2Q@mail.gmail.com>

https://code.facebook.com/posts/1072626246134461/introducing-fblearner-flow-facebook-s-ai-backbone/
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From jep200404 at columbus.rr.com  Wed May 11 16:23:51 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Wed, 11 May 2016 16:23:51 -0400
Subject: [CentralOH] 2016-05-11 Cafe Istanbul Napkin Scribbles submit talk
 proposal PyOhio uart rs-232 pyserial websockets web.py autobahn
 django-channels LCD ITO kalman filter thoughworks martin fowler uncle bob
 E-prime bugs pitch black uvloop
Message-ID: <20160511162351.29f3df4e.jep200404@columbus.rr.com>

Please submit proposals for talks for PyOhio.
http://pyohio.org/call-for-proposals/

UARTs and RS-232 are obsolete (NOT!)
pyserial

websockets

    web.py
    http://webpy.org/
    wp:Aaron Swartz
    wp:Hal Abelson
    wp:Structure and Interpretation of Computer Programs
    wp: prefix means Wikipedia
    To get good answers, consider following the advice in the links below.
    http://catb.org/~esr/faqs/smart-questions.html
    http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html

    autobahn
        much dox
        big honker

    django-channels
        much dox
        (does _not_ require autobahn)

    djwebsockets: NO
        no dox
        33 commits

    django-websockets: NO
        abandoned

wp:LCD
wp:Indium tin oxide
wp:Indium
wp:heterochromia iridum
wp:Ocular dominance

wp:Kalman filter
    good for distinguishing between noise, or new average
    bell curve
wp:Rudolf E. K?lm?n
wp:Kanthal

wp:ThoughtWorks
    wp:Martin Fowler

Racoons love cat food. Cats stand back and watch.
Ditto skunks.

(I must have) failing tests
all new code must have tests

wp:E-Prime

A bug is not an exposed logic flaw.
A bug is an exposed missing test.

wp:Pitch Black (film)

uvloop fast replacement for asyncio event loop
https://pypi.python.org/pypi/uvloop/

writing with black sharpies on black cloth napkins is hard to read

From jep200404 at columbus.rr.com  Wed May 11 19:01:55 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Wed, 11 May 2016 19:01:55 -0400
Subject: [CentralOH] Python DLL Heck: django channels confusion
In-Reply-To: <20160511162351.29f3df4e.jep200404@columbus.rr.com>
References: <20160511162351.29f3df4e.jep200404@columbus.rr.com>
Message-ID: <20160511190155.1b926623.jep200404@columbus.rr.com>

Here's one trap to know about and avoid.

On Wed, 11 May 2016 16:23:51 -0400, jep200404 at columbus.rr.com wrote:

>     django-channels
>         much dox
>         (does _not_ require autobahn)

I stated at lunch that django channels had autobahn as a dependency,
but I could not replicate that after lunch, then later I could.

Something was not making sense.

There are two different packages with enough similarities to confuse. 

    Each is imported as channels.
    Each is for django.
    Both have docs on readthedocs.
        Django Channels
        django-channels
    Their names are both include 'channels'.

Now that you know that there are two similar named packages,
you can figure out which one you care about
if you ever have to deal with such stuff.
Some details on them follow.

channels

    https://pypi.python.org/pypi/channels/
    http://channels.readthedocs.io/en/latest/

        Django Channels

        Channels is a project to make Django able to handle more than just
        plain HTTP requests, including WebSockets and HTTP2, as well as the
        ability to run code after a response has been sent for things like
        thumbnailing or background calculation.

    https://github.com/andrewgodwin/channels

    (env) pi at raspberrypi:~/a $ pip freeze
    (env) pi at raspberrypi:~/a $ pip install channels
    ...
    (env) pi at raspberrypi:~/a $ pip freeze
    Django==1.9.6
    Twisted==16.1.1
    asgiref==0.13.0
    autobahn==0.14.0
    channels==0.13.0
    daphne==0.12.0
    six==1.10.0
    txaio==2.5.1
    zope.interface==4.1.3
    (env) pi at raspberrypi:~/a $ python
    Python 3.4.2 (default, Oct 19 2014, 13:31:11)
    [GCC 4.9.1] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import channels
    >>>
    (env) pi at raspberrypi:~/a $

django-channels

    https://pypi.python.org/pypi/django-channels/
    http://django-channels.readthedocs.io/en/latest/

        django-channels

        django-channels is a Django library for sending notifications.
        HipChat, Slack, Twitter, and Yo are supported for now.

    https://github.com/ymyzk/django-channels

    (env) pi at raspberrypi:~/a $ pip freeze
    (env) pi at raspberrypi:~/a $ pip install django-channels
    ...
    (env) pi at raspberrypi:~/a $ pip freeze
    django-channels==0.6.0
    oauthlib==1.1.1
    requests==2.10.0
    requests-oauthlib==0.6.1
    six==1.10.0
    (env) pi at raspberrypi:~/a $
    (env) pi at raspberrypi:~/a $ python
    Python 3.4.2 (default, Oct 19 2014, 13:31:11)
    [GCC 4.9.1] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import channels
    >>>
    (env) pi at raspberrypi:~/a $

From jep200404 at columbus.rr.com  Sat May 14 17:01:46 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sat, 14 May 2016 17:01:46 -0400
Subject: [CentralOH] =?utf-8?q?2016-05-13_=E9=81=93=E5=A0=B4_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz8gY2FuaXVzZSBkZCBjaWVsbyB5aWVsZCBmcm9tIHV5?=
 =?utf-8?q?uni_gen_limit_websockets_no_assignment_sicp_uncle_bob_meld_diff?=
 =?utf-8?q?_np_hard_bronowski_ascent_of_man_connections_james_burke_first_?=
 =?utf-8?q?computer_use_notepad++_swift_atom_pycandy_optimization_pycharm?=
Message-ID: <20160514170146.05318394.jep200404@columbus.rr.com>

caniuse.com

more dd stuff
http://www.techworm.net/2016/05/backup-partition-linux.html

https://www.youtube.com/watch?v=DkI7LaJ7ncQ
http://data.hdwallpapers.im/salt_flats_walking_on_clouds.jpg

Playing with 'yield from'.

    from itertools import count

    def foo():
        yield from range(3)
        yield from ('hello', 'world')
        yield from count()

    list(x[0] for x in zip(foo(), range(10)))

    # See PEP 380 https://www.python.org/dev/peps/pep-0380/

By the way, that last line's way of limiting a generator to n values
looks ugly. What's a Pythonic way of doing that?

http://websocketstest.com

WebSockets from the Wire Up
http://pyvideo.org/video/3506/websockets-from-the-wire-up
    https://tools.ietf.org/html/rfc6455
    http://danielmiessler.com/study/tcpdump/
    https://github.com/spang/websockets-from-the-wire-up
    http://enterprisewebbook.com/ch8_websockets.html
        http://enterprisewebbook.com/ch8_websockets.html#upgrading_http_to_websocket
    https://flask-socketio.readthedocs.org/en/latest/

no assignment statements in first 259 pages of SICP
then apologized for

unclebob at cleancoder.com
cleancoders.com
blog.8thlight.com
@unclebobmartin

Privacy and the New Math
http://www.linuxjournal.com/content/privacy-and-new-math

What's the difference?

    meld is beautiful
    https://docs.python.org/3/library/difflib.html
    https://github.com/bollwyvl/nbdiffstream

What kind of person rhymes with Haskell?

Make More Responsive Web Applications with SocketIO and gevent
http://pyvideo.org/video/1798/make-more-responsive-web-applications-with-socket
@Luke Sneeringer
lukesn.me/py2013-socketio

Node Schmode!
"Pythonic Realtime Web"
http://gpys.pretaweb.com
Dylan Jay
@djay75
dylan at pretaweb.com

    "Node and scaling in the Small vs Scaling in the Largs" - Alex Payne
    http://al3x.net/2010/07/27/node.html
    wp:Thomas Paine

wp: prefix means Wikipedia
To get good answers, consider following the advice in the links below.
http://catb.org/~esr/faqs/smart-questions.html
http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html

https://www.djangopackages.com/grids/g/websockets/
https://websockets.readthedocs.io/en/stable/intro.html

browserquest.mozilla.org

first
    list(zip(someiterable, range(n)))[0][0]
    what's a better way of limiting someiterable to n items?
fold

There are NP hard problems, then there are just plain hard problems.

    refactor using classes

http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html

https://opensource.com/business/16/5/oscon-interview-donna-benjamin-leslie-hawthorn

Bronowski
Ascent of Man
Connections
James Burke

how old were you when you first used a computer?

24-25
11
2
17-18
~12
28

wp:Margarine
wp:Napoleon III

swift ios

notepad++
atom (saves in .py)

lean team

dealer.com

python eye candy
pycandy

Premature optimization is the root of all evil.

For the love of money is the root of all evil:
which while some coveted after,
they have erred from the faith,
and pierced themselves through with many sorrows.

pycharm

Dragon Bridge (Da Nang)

From joe at joeshaw.org  Sat May 14 18:38:23 2016
From: joe at joeshaw.org (Joe Shaw)
Date: Sat, 14 May 2016 22:38:23 +0000
Subject: [CentralOH] 
	=?utf-8?q?2016-05-13_=E9=81=93=E5=A0=B4_Scribbles_?=
	=?utf-8?b?76SY5pu4L+aDoeaWhz8gY2FuaXVzZSBkZCBjaWVsbyB5aWVsZCBmcm9t?=
	=?utf-8?q?_uyuni_gen_limit_websockets_no_assignment_sicp_uncle_bob?=
	=?utf-8?q?_meld_diff_np_hard_bronowski_ascent_of_man_connections_j?=
	=?utf-8?q?ames_burke_first_computer_use_notepad++_swift_atom_pycan?=
	=?utf-8?q?dy_optimization_pycharm?=
In-Reply-To: <20160514170146.05318394.jep200404@columbus.rr.com>
References: <20160514170146.05318394.jep200404@columbus.rr.com>
Message-ID: <CAOxvq7z-3e5RC0NZ559kcKugsUV2Y6dACOoLVCssNspkHN18Qw@mail.gmail.com>

Hi,

Could you do this instead?

list(foo() for i in range(10))

Joe

On Sat, May 14, 2016 at 5:01 PM <jep200404 at columbus.rr.com> wrote:

> caniuse.com
>
> more dd stuff
> http://www.techworm.net/2016/05/backup-partition-linux.html
>
> https://www.youtube.com/watch?v=DkI7LaJ7ncQ
> http://data.hdwallpapers.im/salt_flats_walking_on_clouds.jpg
>
> Playing with 'yield from'.
>
>     from itertools import count
>
>     def foo():
>         yield from range(3)
>         yield from ('hello', 'world')
>         yield from count()
>
>     list(x[0] for x in zip(foo(), range(10)))
>
>     # See PEP 380 https://www.python.org/dev/peps/pep-0380/
>
> By the way, that last line's way of limiting a generator to n values
> looks ugly. What's a Pythonic way of doing that?
>
> http://websocketstest.com
>
> WebSockets from the Wire Up
> http://pyvideo.org/video/3506/websockets-from-the-wire-up
>     https://tools.ietf.org/html/rfc6455
>     http://danielmiessler.com/study/tcpdump/
>     https://github.com/spang/websockets-from-the-wire-up
>     http://enterprisewebbook.com/ch8_websockets.html
>
> http://enterprisewebbook.com/ch8_websockets.html#upgrading_http_to_websocket
>     https://flask-socketio.readthedocs.org/en/latest/
>
> no assignment statements in first 259 pages of SICP
> then apologized for
>
> unclebob at cleancoder.com
> cleancoders.com
> blog.8thlight.com
> @unclebobmartin
>
> Privacy and the New Math
> http://www.linuxjournal.com/content/privacy-and-new-math
>
> What's the difference?
>
>     meld is beautiful
>     https://docs.python.org/3/library/difflib.html
>     https://github.com/bollwyvl/nbdiffstream
>
> What kind of person rhymes with Haskell?
>
> Make More Responsive Web Applications with SocketIO and gevent
>
> http://pyvideo.org/video/1798/make-more-responsive-web-applications-with-socket
> @Luke Sneeringer
> lukesn.me/py2013-socketio
>
> Node Schmode!
> "Pythonic Realtime Web"
> http://gpys.pretaweb.com
> Dylan Jay
> @djay75
> dylan at pretaweb.com
>
>     "Node and scaling in the Small vs Scaling in the Largs" - Alex Payne
>     http://al3x.net/2010/07/27/node.html
>     wp:Thomas Paine
>
> wp: prefix means Wikipedia
> To get good answers, consider following the advice in the links below.
> http://catb.org/~esr/faqs/smart-questions.html
>
> http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html
>
> https://www.djangopackages.com/grids/g/websockets/
> https://websockets.readthedocs.io/en/stable/intro.html
>
> browserquest.mozilla.org
>
> first
>     list(zip(someiterable, range(n)))[0][0]
>     what's a better way of limiting someiterable to n items?
> fold
>
> There are NP hard problems, then there are just plain hard problems.
>
>     refactor using classes
>
> http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html
>
>
> https://opensource.com/business/16/5/oscon-interview-donna-benjamin-leslie-hawthorn
>
> Bronowski
> Ascent of Man
> Connections
> James Burke
>
> how old were you when you first used a computer?
>
> 24-25
> 11
> 2
> 17-18
> ~12
> 28
>
> wp:Margarine
> wp:Napoleon III
>
> swift ios
>
> notepad++
> atom (saves in .py)
>
> lean team
>
> dealer.com
>
> python eye candy
> pycandy
>
> Premature optimization is the root of all evil.
>
> For the love of money is the root of all evil:
> which while some coveted after,
> they have erred from the faith,
> and pierced themselves through with many sorrows.
>
> pycharm
>
> Dragon Bridge (Da Nang)
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From joe at joeshaw.org  Sat May 14 18:39:58 2016
From: joe at joeshaw.org (Joe Shaw)
Date: Sat, 14 May 2016 22:39:58 +0000
Subject: [CentralOH] 
	=?utf-8?q?2016-05-13_=E9=81=93=E5=A0=B4_Scribbles_?=
	=?utf-8?b?76SY5pu4L+aDoeaWhz8gY2FuaXVzZSBkZCBjaWVsbyB5aWVsZCBmcm9t?=
	=?utf-8?q?_uyuni_gen_limit_websockets_no_assignment_sicp_uncle_bob?=
	=?utf-8?q?_meld_diff_np_hard_bronowski_ascent_of_man_connections_j?=
	=?utf-8?q?ames_burke_first_computer_use_notepad++_swift_atom_pycan?=
	=?utf-8?q?dy_optimization_pycharm?=
In-Reply-To: <CAOxvq7z-3e5RC0NZ559kcKugsUV2Y6dACOoLVCssNspkHN18Qw@mail.gmail.com>
References: <20160514170146.05318394.jep200404@columbus.rr.com>
 <CAOxvq7z-3e5RC0NZ559kcKugsUV2Y6dACOoLVCssNspkHN18Qw@mail.gmail.com>
Message-ID: <CAOxvq7wh=14z0vbdxYHPcbocEzuUb0quY-zdEX0hjim7edSypA@mail.gmail.com>

Hi again,

Or rather:

[foo() for i in range(10)]

Joe
On Sat, May 14, 2016 at 6:38 PM Joe Shaw <joe at joeshaw.org> wrote:

> Hi,
>
> Could you do this instead?
>
> list(foo() for i in range(10))
>
>
> Joe
>
> On Sat, May 14, 2016 at 5:01 PM <jep200404 at columbus.rr.com> wrote:
>
>> caniuse.com
>>
>> more dd stuff
>> http://www.techworm.net/2016/05/backup-partition-linux.html
>>
>> https://www.youtube.com/watch?v=DkI7LaJ7ncQ
>> http://data.hdwallpapers.im/salt_flats_walking_on_clouds.jpg
>>
>> Playing with 'yield from'.
>>
>>     from itertools import count
>>
>>     def foo():
>>         yield from range(3)
>>         yield from ('hello', 'world')
>>         yield from count()
>>
>>     list(x[0] for x in zip(foo(), range(10)))
>>
>>     # See PEP 380 https://www.python.org/dev/peps/pep-0380/
>>
>> By the way, that last line's way of limiting a generator to n values
>> looks ugly. What's a Pythonic way of doing that?
>>
>> http://websocketstest.com
>>
>> WebSockets from the Wire Up
>> http://pyvideo.org/video/3506/websockets-from-the-wire-up
>>     https://tools.ietf.org/html/rfc6455
>>     http://danielmiessler.com/study/tcpdump/
>>     https://github.com/spang/websockets-from-the-wire-up
>>     http://enterprisewebbook.com/ch8_websockets.html
>>
>> http://enterprisewebbook.com/ch8_websockets.html#upgrading_http_to_websocket
>>     https://flask-socketio.readthedocs.org/en/latest/
>>
>> no assignment statements in first 259 pages of SICP
>> then apologized for
>>
>> unclebob at cleancoder.com
>> cleancoders.com
>> blog.8thlight.com
>> @unclebobmartin
>>
>> Privacy and the New Math
>> http://www.linuxjournal.com/content/privacy-and-new-math
>>
>> What's the difference?
>>
>>     meld is beautiful
>>     https://docs.python.org/3/library/difflib.html
>>     https://github.com/bollwyvl/nbdiffstream
>>
>> What kind of person rhymes with Haskell?
>>
>> Make More Responsive Web Applications with SocketIO and gevent
>>
>> http://pyvideo.org/video/1798/make-more-responsive-web-applications-with-socket
>> @Luke Sneeringer
>> lukesn.me/py2013-socketio
>>
>> Node Schmode!
>> "Pythonic Realtime Web"
>> http://gpys.pretaweb.com
>> Dylan Jay
>> @djay75
>> dylan at pretaweb.com
>>
>>     "Node and scaling in the Small vs Scaling in the Largs" - Alex Payne
>>     http://al3x.net/2010/07/27/node.html
>>     wp:Thomas Paine
>>
>> wp: prefix means Wikipedia
>> To get good answers, consider following the advice in the links below.
>> http://catb.org/~esr/faqs/smart-questions.html
>>
>> http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html
>>
>> https://www.djangopackages.com/grids/g/websockets/
>> https://websockets.readthedocs.io/en/stable/intro.html
>>
>> browserquest.mozilla.org
>>
>> first
>>     list(zip(someiterable, range(n)))[0][0]
>>     what's a better way of limiting someiterable to n items?
>> fold
>>
>> There are NP hard problems, then there are just plain hard problems.
>>
>>     refactor using classes
>>
>>
>> http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html
>>
>>
>> https://opensource.com/business/16/5/oscon-interview-donna-benjamin-leslie-hawthorn
>>
>> Bronowski
>> Ascent of Man
>> Connections
>> James Burke
>>
>> how old were you when you first used a computer?
>>
>> 24-25
>> 11
>> 2
>> 17-18
>> ~12
>> 28
>>
>> wp:Margarine
>> wp:Napoleon III
>>
>> swift ios
>>
>> notepad++
>> atom (saves in .py)
>>
>> lean team
>>
>> dealer.com
>>
>> python eye candy
>> pycandy
>>
>> Premature optimization is the root of all evil.
>>
>> For the love of money is the root of all evil:
>> which while some coveted after,
>> they have erred from the faith,
>> and pierced themselves through with many sorrows.
>>
>> pycharm
>>
>> Dragon Bridge (Da Nang)
>> _______________________________________________
>> CentralOH mailing list
>> CentralOH at python.org
>> https://mail.python.org/mailman/listinfo/centraloh
>>
>
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From andrewkubera at gmail.com  Sun May 15 00:24:33 2016
From: andrewkubera at gmail.com (Andrew Kubera)
Date: Sun, 15 May 2016 00:24:33 -0400
Subject: [CentralOH] 
 =?utf-8?q?2016-05-13_=E9=81=93=E5=A0=B4_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz8gY2FuaXVzZSBkZCBjaWVsbyB5aWVsZCBmcm9tIHV5?=
 =?utf-8?q?uni_gen_limit_websockets_no_assignment_sicp_uncle_bob_meld_diff?=
 =?utf-8?q?_np_hard_bronowski_ascent_of_man_connections_james_burke_first_?=
 =?utf-8?q?computer_use_notepad++_swift_atom_pycandy_optimization_pycharm?=
In-Reply-To: <CAOxvq7wh=14z0vbdxYHPcbocEzuUb0quY-zdEX0hjim7edSypA@mail.gmail.com>
References: <20160514170146.05318394.jep200404@columbus.rr.com>
 <CAOxvq7z-3e5RC0NZ559kcKugsUV2Y6dACOoLVCssNspkHN18Qw@mail.gmail.com>
 <CAOxvq7wh=14z0vbdxYHPcbocEzuUb0quY-zdEX0hjim7edSypA@mail.gmail.com>
Message-ID: <C9762AB4-D50D-495D-80AD-325196C84A06@gmail.com>

Itertools has an islice function which could be used for this.

from itertools import islice
...
list(islice(foo(), 10))


Without using islice, you wouldn't call foo (Joe's method would create a
list of 10 generator objects), but next() with the generator created by calling foo:

foo_gen = foo()
[next(foo_gen) for _ in range(10)]

- Andrew Kubera

> On May 14, 2016, at 6:39 PM, Joe Shaw <joe at joeshaw.org> wrote:
> 
> Hi again,
> 
> Or rather:
> 
> [foo() for i in range(10)]
> 
> Joe
> On Sat, May 14, 2016 at 6:38 PM Joe Shaw <joe at joeshaw.org <mailto:joe at joeshaw.org>> wrote:
> Hi,
> 
> Could you do this instead?
> 
> list(foo() for i in range(10))
> 
> 
> Joe
> 
> On Sat, May 14, 2016 at 5:01 PM <jep200404 at columbus.rr.com <mailto:jep200404 at columbus.rr.com>> wrote:
> caniuse.com <http://caniuse.com/>
> 
> more dd stuff
> http://www.techworm.net/2016/05/backup-partition-linux.html <http://www.techworm.net/2016/05/backup-partition-linux.html>
> 
> https://www.youtube.com/watch?v=DkI7LaJ7ncQ <https://www.youtube.com/watch?v=DkI7LaJ7ncQ>
> http://data.hdwallpapers.im/salt_flats_walking_on_clouds.jpg <http://data.hdwallpapers.im/salt_flats_walking_on_clouds.jpg>
> 
> Playing with 'yield from'.
> 
>     from itertools import count
> 
>     def foo():
>         yield from range(3)
>         yield from ('hello', 'world')
>         yield from count()
> 
>     list(x[0] for x in zip(foo(), range(10)))
> 
>     # See PEP 380 https://www.python.org/dev/peps/pep-0380/ <https://www.python.org/dev/peps/pep-0380/>
> 
> By the way, that last line's way of limiting a generator to n values
> looks ugly. What's a Pythonic way of doing that?
> 
> http://websocketstest.com <http://websocketstest.com/>
> 
> WebSockets from the Wire Up
> http://pyvideo.org/video/3506/websockets-from-the-wire-up <http://pyvideo.org/video/3506/websockets-from-the-wire-up>
>     https://tools.ietf.org/html/rfc6455 <https://tools.ietf.org/html/rfc6455>
>     http://danielmiessler.com/study/tcpdump/ <http://danielmiessler.com/study/tcpdump/>
>     https://github.com/spang/websockets-from-the-wire-up <https://github.com/spang/websockets-from-the-wire-up>
>     http://enterprisewebbook.com/ch8_websockets.html <http://enterprisewebbook.com/ch8_websockets.html>
>         http://enterprisewebbook.com/ch8_websockets.html#upgrading_http_to_websocket <http://enterprisewebbook.com/ch8_websockets.html#upgrading_http_to_websocket>
>     https://flask-socketio.readthedocs.org/en/latest/ <https://flask-socketio.readthedocs.org/en/latest/>
> 
> no assignment statements in first 259 pages of SICP
> then apologized for
> 
> unclebob at cleancoder.com <mailto:unclebob at cleancoder.com>
> cleancoders.com <http://cleancoders.com/>
> blog.8thlight.com <http://blog.8thlight.com/>
> @unclebobmartin
> 
> Privacy and the New Math
> http://www.linuxjournal.com/content/privacy-and-new-math <http://www.linuxjournal.com/content/privacy-and-new-math>
> 
> What's the difference?
> 
>     meld is beautiful
>     https://docs.python.org/3/library/difflib.html <https://docs.python.org/3/library/difflib.html>
>     https://github.com/bollwyvl/nbdiffstream <https://github.com/bollwyvl/nbdiffstream>
> 
> What kind of person rhymes with Haskell?
> 
> Make More Responsive Web Applications with SocketIO and gevent
> http://pyvideo.org/video/1798/make-more-responsive-web-applications-with-socket <http://pyvideo.org/video/1798/make-more-responsive-web-applications-with-socket>
> @Luke Sneeringer
> lukesn.me/py2013-socketio <http://lukesn.me/py2013-socketio>
> 
> Node Schmode!
> "Pythonic Realtime Web"
> http://gpys.pretaweb.com <http://gpys.pretaweb.com/>
> Dylan Jay
> @djay75
> dylan at pretaweb.com <mailto:dylan at pretaweb.com>
> 
>     "Node and scaling in the Small vs Scaling in the Largs" - Alex Payne
>     http://al3x.net/2010/07/27/node.html <http://al3x.net/2010/07/27/node.html>
>     wp:Thomas Paine
> 
> wp: prefix means Wikipedia
> To get good answers, consider following the advice in the links below.
> http://catb.org/~esr/faqs/smart-questions.html <http://catb.org/~esr/faqs/smart-questions.html>
> http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html <http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html>
> 
> https://www.djangopackages.com/grids/g/websockets/ <https://www.djangopackages.com/grids/g/websockets/>
> https://websockets.readthedocs.io/en/stable/intro.html <https://websockets.readthedocs.io/en/stable/intro.html>
> 
> browserquest.mozilla.org <http://browserquest.mozilla.org/>
> 
> first
>     list(zip(someiterable, range(n)))[0][0]
>     what's a better way of limiting someiterable to n items?
> fold
> 
> There are NP hard problems, then there are just plain hard problems.
> 
>     refactor using classes
> 
> http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html <http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html>
> 
> https://opensource.com/business/16/5/oscon-interview-donna-benjamin-leslie-hawthorn <https://opensource.com/business/16/5/oscon-interview-donna-benjamin-leslie-hawthorn>
> 
> Bronowski
> Ascent of Man
> Connections
> James Burke
> 
> how old were you when you first used a computer?
> 
> 24-25
> 11
> 2
> 17-18
> ~12
> 28
> 
> wp:Margarine
> wp:Napoleon III
> 
> swift ios
> 
> notepad++
> atom (saves in .py)
> 
> lean team
> 
> dealer.com <http://dealer.com/>
> 
> python eye candy
> pycandy
> 
> Premature optimization is the root of all evil.
> 
> For the love of money is the root of all evil:
> which while some coveted after,
> they have erred from the faith,
> and pierced themselves through with many sorrows.
> 
> pycharm
> 
> Dragon Bridge (Da Nang)
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org <mailto:CentralOH at python.org>
> https://mail.python.org/mailman/listinfo/centraloh <https://mail.python.org/mailman/listinfo/centraloh>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh

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From joe at joeshaw.org  Sun May 15 07:38:53 2016
From: joe at joeshaw.org (Joe Shaw)
Date: Sun, 15 May 2016 11:38:53 +0000
Subject: [CentralOH] 
	=?utf-8?q?2016-05-13_=E9=81=93=E5=A0=B4_Scribbles_?=
	=?utf-8?b?76SY5pu4L+aDoeaWhz8gY2FuaXVzZSBkZCBjaWVsbyB5aWVsZCBmcm9t?=
	=?utf-8?q?_uyuni_gen_limit_websockets_no_assignment_sicp_uncle_bob?=
	=?utf-8?q?_meld_diff_np_hard_bronowski_ascent_of_man_connections_j?=
	=?utf-8?q?ames_burke_first_computer_use_notepad++_swift_atom_pycan?=
	=?utf-8?q?dy_optimization_pycharm?=
In-Reply-To: <C9762AB4-D50D-495D-80AD-325196C84A06@gmail.com>
References: <20160514170146.05318394.jep200404@columbus.rr.com>
 <CAOxvq7z-3e5RC0NZ559kcKugsUV2Y6dACOoLVCssNspkHN18Qw@mail.gmail.com>
 <CAOxvq7wh=14z0vbdxYHPcbocEzuUb0quY-zdEX0hjim7edSypA@mail.gmail.com>
 <C9762AB4-D50D-495D-80AD-325196C84A06@gmail.com>
Message-ID: <CAOxvq7y8Zcjsigv_0tODq0O5r_5rPz36f=1U2MRXgmgGF771yg@mail.gmail.com>

Hi,

Ah, right you are about creating these generator objects. The other issue
with using a list comprehension here is that unless you know it'll have at
least 10 elements you need to handle StopIteration too. So
itertools.islice() (or an old-fashioned for loop) is probably the way to
go.

Joe
On Sun, May 15, 2016 at 12:24 AM Andrew Kubera <andrewkubera at gmail.com>
wrote:

> Itertools has an islice function which could be used for this.
>
> from itertools import islice
> ...
> list(islice(foo(), 10))
>
>
> Without using islice, you wouldn't call foo (Joe's method would create a
> list of 10 generator objects), but next() with the generator created by
> calling foo:
>
> foo_gen = foo()
> [next(foo_gen) for _ in range(10)]
>
> - Andrew Kubera
>
> On May 14, 2016, at 6:39 PM, Joe Shaw <joe at joeshaw.org> wrote:
>
> Hi again,
>
> Or rather:
>
> [foo() for i in range(10)]
>
> Joe
> On Sat, May 14, 2016 at 6:38 PM Joe Shaw <joe at joeshaw.org> wrote:
>
>> Hi,
>>
>> Could you do this instead?
>>
>> list(foo() for i in range(10))
>>
>>
>> Joe
>>
>> On Sat, May 14, 2016 at 5:01 PM <jep200404 at columbus.rr.com> wrote:
>>
>>> caniuse.com
>>>
>>> more dd stuff
>>> http://www.techworm.net/2016/05/backup-partition-linux.html
>>>
>>> https://www.youtube.com/watch?v=DkI7LaJ7ncQ
>>> http://data.hdwallpapers.im/salt_flats_walking_on_clouds.jpg
>>>
>>> Playing with 'yield from'.
>>>
>>>     from itertools import count
>>>
>>>     def foo():
>>>         yield from range(3)
>>>         yield from ('hello', 'world')
>>>         yield from count()
>>>
>>>     list(x[0] for x in zip(foo(), range(10)))
>>>
>>>     # See PEP 380 https://www.python.org/dev/peps/pep-0380/
>>>
>>> By the way, that last line's way of limiting a generator to n values
>>> looks ugly. What's a Pythonic way of doing that?
>>>
>>> http://websocketstest.com
>>>
>>> WebSockets from the Wire Up
>>> http://pyvideo.org/video/3506/websockets-from-the-wire-up
>>>     https://tools.ietf.org/html/rfc6455
>>>     http://danielmiessler.com/study/tcpdump/
>>>     https://github.com/spang/websockets-from-the-wire-up
>>>     http://enterprisewebbook.com/ch8_websockets.html
>>>
>>> http://enterprisewebbook.com/ch8_websockets.html#upgrading_http_to_websocket
>>>     https://flask-socketio.readthedocs.org/en/latest/
>>>
>>> no assignment statements in first 259 pages of SICP
>>> then apologized for
>>>
>>> unclebob at cleancoder.com
>>> cleancoders.com
>>> blog.8thlight.com
>>> @unclebobmartin
>>>
>>> Privacy and the New Math
>>> http://www.linuxjournal.com/content/privacy-and-new-math
>>>
>>> What's the difference?
>>>
>>>     meld is beautiful
>>>     https://docs.python.org/3/library/difflib.html
>>>     https://github.com/bollwyvl/nbdiffstream
>>>
>>> What kind of person rhymes with Haskell?
>>>
>>> Make More Responsive Web Applications with SocketIO and gevent
>>>
>>> http://pyvideo.org/video/1798/make-more-responsive-web-applications-with-socket
>>> @Luke Sneeringer
>>> lukesn.me/py2013-socketio
>>>
>>> Node Schmode!
>>> "Pythonic Realtime Web"
>>> http://gpys.pretaweb.com
>>> Dylan Jay
>>> @djay75
>>> dylan at pretaweb.com
>>>
>>>     "Node and scaling in the Small vs Scaling in the Largs" - Alex Payne
>>>     http://al3x.net/2010/07/27/node.html
>>>     wp:Thomas Paine
>>>
>>> wp: prefix means Wikipedia
>>> To get good answers, consider following the advice in the links below.
>>> http://catb.org/~esr/faqs/smart-questions.html
>>>
>>> http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html
>>>
>>> https://www.djangopackages.com/grids/g/websockets/
>>> https://websockets.readthedocs.io/en/stable/intro.html
>>>
>>> browserquest.mozilla.org
>>>
>>> first
>>>     list(zip(someiterable, range(n)))[0][0]
>>>     what's a better way of limiting someiterable to n items?
>>> fold
>>>
>>> There are NP hard problems, then there are just plain hard problems.
>>>
>>>     refactor using classes
>>>
>>>
>>> http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html
>>>
>>>
>>> https://opensource.com/business/16/5/oscon-interview-donna-benjamin-leslie-hawthorn
>>>
>>> Bronowski
>>> Ascent of Man
>>> Connections
>>> James Burke
>>>
>>> how old were you when you first used a computer?
>>>
>>> 24-25
>>> 11
>>> 2
>>> 17-18
>>> ~12
>>> 28
>>>
>>> wp:Margarine
>>> wp:Napoleon III
>>>
>>> swift ios
>>>
>>> notepad++
>>> atom (saves in .py)
>>>
>>> lean team
>>>
>>> dealer.com
>>>
>>> python eye candy
>>> pycandy
>>>
>>> Premature optimization is the root of all evil.
>>>
>>> For the love of money is the root of all evil:
>>> which while some coveted after,
>>> they have erred from the faith,
>>> and pierced themselves through with many sorrows.
>>>
>>> pycharm
>>>
>>> Dragon Bridge (Da Nang)
>>> _______________________________________________
>>> CentralOH mailing list
>>> CentralOH at python.org
>>> https://mail.python.org/mailman/listinfo/centraloh
>>>
>> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From jep200404 at columbus.rr.com  Sun May 15 15:54:18 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sun, 15 May 2016 15:54:18 -0400
Subject: [CentralOH] 2016-05-18 11:30 Wednesday Python Lunch at Aab
Message-ID: <20160515155418.68f2fb9f.jep200404@columbus.rr.com>

Wednesday Python Lunch at Aab
May 18, 2016, 11:30 a.m.

Aab India Restaurant[1]
1470 Grandview Ave[2]
Columbus, OH 43212

We'll be meeting for good food and good company.
Join us to talk Python, programming, or anything else!

[1] http://aabindiarestaurants.com/
[2] https://www.openstreetmap.org/node/962881986#map=17/39.98795/-83.04423

From eric at intellovations.com  Sun May 15 18:22:14 2016
From: eric at intellovations.com (Eric Floehr)
Date: Sun, 15 May 2016 18:22:14 -0400
Subject: [CentralOH] 2016-05-18 11:30 Wednesday Python Lunch at Aab
In-Reply-To: <20160515155418.68f2fb9f.jep200404@columbus.rr.com>
References: <20160515155418.68f2fb9f.jep200404@columbus.rr.com>
Message-ID: <CAJzarMNHpJ-4V0C2Z_bJYpkawpgo8=mPBzNsKfYWmHcYSP-_PA@mail.gmail.com>

RSVP Here:
http://www.meetup.com/Central-Ohio-Python-Users-Group/events/231149380/



On Sun, May 15, 2016 at 3:54 PM, <jep200404 at columbus.rr.com> wrote:

> Wednesday Python Lunch at Aab
> May 18, 2016, 11:30 a.m.
>
> Aab India Restaurant[1]
> 1470 Grandview Ave[2]
> Columbus, OH 43212
>
> We'll be meeting for good food and good company.
> Join us to talk Python, programming, or anything else!
>
> [1] http://aabindiarestaurants.com/
> [2] https://www.openstreetmap.org/node/962881986#map=17/39.98795/-83.04423
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From eric at intellovations.com  Sun May 15 18:27:59 2016
From: eric at intellovations.com (Eric Floehr)
Date: Sun, 15 May 2016 18:27:59 -0400
Subject: [CentralOH] May Meeting May 23!
Message-ID: <CAJzarMOuGKyAutHZcO-WC=iHYhbq9tvoz4JJngkH+yTv2Lwung@mail.gmail.com>

Don't forget our May Monthly meeting is one week early, on Monday, May 23rd.

RSVP Here:
http://www.meetup.com/Central-Ohio-Python-Users-Group/events/228901485/

We will be awarding the prize for closest temperature prediction from our
March challenge.

We will also be going through submissions for our April challenge, which is
the word count. I am doing this challenge because it is helping me to work
with py.test, and am learning more about Python!

Here is the repo with the instructions:
https://github.com/cohpy/challenge-201604-words

You can submit your code to me, or as a pull request.

Finally, Brian will be talking about generators. Generators are pretty
cool, and our May Python challenge may have something to do with them!

See you in a week!
Eric
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From eric at intellovations.com  Mon May 16 14:59:44 2016
From: eric at intellovations.com (Eric Floehr)
Date: Mon, 16 May 2016 14:59:44 -0400
Subject: [CentralOH] OT: Statistician needed
Message-ID: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>

Hey all,

I'm in need of some help with statistics, and if anyone has any thoughts on
this, or know someone who could do this, I would appreciate it greatly.

I have a set of errors, normally distributed around 0 error (it's
temperature forecast error). You can assume that the sample of forecasts is
representative of the entire population (for example, taking 50 strategic
locations around the U.S. to represent all U.S. locations).

I then calculate the mean absolute error, and the RMSE. These have some
positive value.

What I would like to calculate on the MAE and RMSE is a confidence interval
that the population error is within given the sample MAE or RMSE and it's
related statistics (sample size, mean error, MAE, RMSE, standard deviation,
etc.).

For example, let's say that one provider's RMSE is 3.18 (A) and another's
is 3.5 (B). I'd like to know with some confidence that there is (or isn't)
a difference between providers (i.e. that provider A confidently has lower
error than B).

Currently, the way I'm doing it is using the normative inverse function in
Excel:

Lower bound: NORMINV(0.005,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))

Upper bound: NORMINV(0.995,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))

as in section 9.18 of:
http://www.saylor.org/site/wp-content/uploads/2012/10/BUS204-Ling-6.2.pdf

But I'm not at all convinced that I'm doing that right, or that it applies
in this situation.

Thanks so much!
Eric
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From bim at digitalbim.com  Mon May 16 16:11:49 2016
From: bim at digitalbim.com (Bim Walker)
Date: Mon, 16 May 2016 16:11:49 -0400
Subject: [CentralOH] OT: Statistician needed
In-Reply-To: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
References: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
Message-ID: <620477B5-58DA-4049-8736-EE0337066C99@digitalbim.com>


Can?t you just think of the set of errors as the raw data, and do an independent t-test comparing provider A to provider B?  (or an anova if you have more than two providers.)


Bim



On May 16, 2016, at 2:59 PM, Eric Floehr <eric at intellovations.com> wrote:

> Hey all,
> 
> I'm in need of some help with statistics, and if anyone has any thoughts on this, or know someone who could do this, I would appreciate it greatly.
> 
> I have a set of errors, normally distributed around 0 error (it's temperature forecast error). You can assume that the sample of forecasts is representative of the entire population (for example, taking 50 strategic locations around the U.S. to represent all U.S. locations).
> 
> I then calculate the mean absolute error, and the RMSE. These have some positive value.
> 
> What I would like to calculate on the MAE and RMSE is a confidence interval that the population error is within given the sample MAE or RMSE and it's related statistics (sample size, mean error, MAE, RMSE, standard deviation, etc.).
> 
> For example, let's say that one provider's RMSE is 3.18 (A) and another's is 3.5 (B). I'd like to know with some confidence that there is (or isn't) a difference between providers (i.e. that provider A confidently has lower error than B).
> 
> Currently, the way I'm doing it is using the normative inverse function in Excel:
> 
> Lower bound: NORMINV(0.005,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
> 
> Upper bound: NORMINV(0.995,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
> 
> as in section 9.18 of: http://www.saylor.org/site/wp-content/uploads/2012/10/BUS204-Ling-6.2.pdf
> 
> But I'm not at all convinced that I'm doing that right, or that it applies in this situation.
> 
> Thanks so much!
> Eric
> 
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh

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From nludban at columbus.rr.com  Mon May 16 17:35:14 2016
From: nludban at columbus.rr.com (Neil Ludban)
Date: Mon, 16 May 2016 17:35:14 -0400
Subject: [CentralOH] OT: Statistician needed
In-Reply-To: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
References: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
Message-ID: <20160516173514.de2be7c018fb86750709a921@columbus.rr.com>

I'm not making any connections here...

(a) Starting with 50 representative locations instead of all of them.

(b) Wanting to estimate paramaters as if you had used them all.

(c) For example, compare the error estimate of one of them by itself
with another one of them by itself.


On Mon, 16 May 2016 14:59:44 -0400
Eric Floehr <eric at intellovations.com> wrote:
> Hey all,
> 
> I'm in need of some help with statistics, and if anyone has any thoughts on
> this, or know someone who could do this, I would appreciate it greatly.
> 
> I have a set of errors, normally distributed around 0 error (it's
> temperature forecast error). You can assume that the sample of forecasts is
> representative of the entire population (for example, taking 50 strategic
> locations around the U.S. to represent all U.S. locations).
> 
> I then calculate the mean absolute error, and the RMSE. These have some
> positive value.
> 
> What I would like to calculate on the MAE and RMSE is a confidence interval
> that the population error is within given the sample MAE or RMSE and it's
> related statistics (sample size, mean error, MAE, RMSE, standard deviation,
> etc.).
> 
> For example, let's say that one provider's RMSE is 3.18 (A) and another's
> is 3.5 (B). I'd like to know with some confidence that there is (or isn't)
> a difference between providers (i.e. that provider A confidently has lower
> error than B).
> 
> Currently, the way I'm doing it is using the normative inverse function in
> Excel:
> 
> Lower bound: NORMINV(0.005,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
> 
> Upper bound: NORMINV(0.995,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
> 
> as in section 9.18 of:
> http://www.saylor.org/site/wp-content/uploads/2012/10/BUS204-Ling-6.2.pdf
> 
> But I'm not at all convinced that I'm doing that right, or that it applies
> in this situation.
> 
> Thanks so much!
> Eric

From eric at intellovations.com  Mon May 16 18:55:36 2016
From: eric at intellovations.com (Eric Floehr)
Date: Mon, 16 May 2016 18:55:36 -0400
Subject: [CentralOH] OT: Statistician needed
In-Reply-To: <20160516173514.de2be7c018fb86750709a921@columbus.rr.com>
References: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
 <20160516173514.de2be7c018fb86750709a921@columbus.rr.com>
Message-ID: <CAJzarMOTubd=zo0UWa8aaVYTaTYnA3ZvO5qedzZhJUdOLB4eQw@mail.gmail.com>

Neil,

I'm not a statistician at all so I don't know what I should even be asking.

Basically, I have some RMSE from a set of forecasts. These forecasts are
from representative locations. I want to know what the range of RMSE would
be (within some confidence factor) if I had taken the error at *all* the
locations.

So when I take a set of forecasts from 50 locations (say each state
capital, assuming that's representative) within the U.S. and get the RMSE
from those forecasts and locations. But there are lots more than 50
locations, so that set of 50 locations is only a sample of all the
forecasts for the U.S. So that set of 50 is only a sample RMSE, which is
likely *close* to the actual RMSE if I had taken *all* the locations.

So when comparing two forecast providers, each with an RMSE, I'm only
estimating each of those RMSEs for each provider. So that estimate isn't
the *true* error, and so if I have two providers, and I want to rank order
them, I want to have some level of confidence that the difference in RMSE
between them is statistically significant.

Does that make sense?
Eric


On Mon, May 16, 2016 at 5:35 PM, Neil Ludban <nludban at columbus.rr.com>
wrote:

> I'm not making any connections here...
>
> (a) Starting with 50 representative locations instead of all of them.
>
> (b) Wanting to estimate paramaters as if you had used them all.
>
> (c) For example, compare the error estimate of one of them by itself
> with another one of them by itself.
>
>
> On Mon, 16 May 2016 14:59:44 -0400
> Eric Floehr <eric at intellovations.com> wrote:
> > Hey all,
> >
> > I'm in need of some help with statistics, and if anyone has any thoughts
> on
> > this, or know someone who could do this, I would appreciate it greatly.
> >
> > I have a set of errors, normally distributed around 0 error (it's
> > temperature forecast error). You can assume that the sample of forecasts
> is
> > representative of the entire population (for example, taking 50 strategic
> > locations around the U.S. to represent all U.S. locations).
> >
> > I then calculate the mean absolute error, and the RMSE. These have some
> > positive value.
> >
> > What I would like to calculate on the MAE and RMSE is a confidence
> interval
> > that the population error is within given the sample MAE or RMSE and it's
> > related statistics (sample size, mean error, MAE, RMSE, standard
> deviation,
> > etc.).
> >
> > For example, let's say that one provider's RMSE is 3.18 (A) and another's
> > is 3.5 (B). I'd like to know with some confidence that there is (or
> isn't)
> > a difference between providers (i.e. that provider A confidently has
> lower
> > error than B).
> >
> > Currently, the way I'm doing it is using the normative inverse function
> in
> > Excel:
> >
> > Lower bound: NORMINV(0.005,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
> >
> > Upper bound: NORMINV(0.995,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
> >
> > as in section 9.18 of:
> >
> http://www.saylor.org/site/wp-content/uploads/2012/10/BUS204-Ling-6.2.pdf
> >
> > But I'm not at all convinced that I'm doing that right, or that it
> applies
> > in this situation.
> >
> > Thanks so much!
> > Eric
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From eric at intellovations.com  Mon May 16 18:56:12 2016
From: eric at intellovations.com (Eric Floehr)
Date: Mon, 16 May 2016 18:56:12 -0400
Subject: [CentralOH] OT: Statistician needed
In-Reply-To: <620477B5-58DA-4049-8736-EE0337066C99@digitalbim.com>
References: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
 <620477B5-58DA-4049-8736-EE0337066C99@digitalbim.com>
Message-ID: <CAJzarMOJ-iRDnphR36ih5NHXxKVv5jHTKy_yvnwUZKjmurF=pQ@mail.gmail.com>

Thanks Bim. I have no idea :-). I'm at the limits of my statistical
knowledge...

On Mon, May 16, 2016 at 4:11 PM, Bim Walker <bim at digitalbim.com> wrote:

>
> Can?t you just think of the set of errors as the raw data, and do an
> independent t-test comparing provider A to provider B?  (or an anova if you
> have more than two providers.)
>
>
> Bim
>
>
>
> On May 16, 2016, at 2:59 PM, Eric Floehr <eric at intellovations.com> wrote:
>
> Hey all,
>
> I'm in need of some help with statistics, and if anyone has any thoughts
> on this, or know someone who could do this, I would appreciate it greatly.
>
> I have a set of errors, normally distributed around 0 error (it's
> temperature forecast error). You can assume that the sample of forecasts is
> representative of the entire population (for example, taking 50 strategic
> locations around the U.S. to represent all U.S. locations).
>
> I then calculate the mean absolute error, and the RMSE. These have some
> positive value.
>
> What I would like to calculate on the MAE and RMSE is a confidence
> interval that the population error is within given the sample MAE or RMSE
> and it's related statistics (sample size, mean error, MAE, RMSE, standard
> deviation, etc.).
>
> For example, let's say that one provider's RMSE is 3.18 (A) and another's
> is 3.5 (B). I'd like to know with some confidence that there is (or isn't)
> a difference between providers (i.e. that provider A confidently has lower
> error than B).
>
> Currently, the way I'm doing it is using the normative inverse function in
> Excel:
>
> Lower bound: NORMINV(0.005,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
>
> Upper bound: NORMINV(0.995,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))
>
> as in section 9.18 of:
> http://www.saylor.org/site/wp-content/uploads/2012/10/BUS204-Ling-6.2.pdf
>
> But I'm not at all convinced that I'm doing that right, or that it applies
> in this situation.
>
> Thanks so much!
> Eric
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
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From bim at digitalbim.com  Mon May 16 20:15:44 2016
From: bim at digitalbim.com (Bim Walker)
Date: Mon, 16 May 2016 20:15:44 -0400
Subject: [CentralOH] OT: Statistician needed
Message-ID: <5fcp39fk54ourd5kojc14b8t.1463444144239@email.lge.com>

I just read your other reply and I think I better understand what you are asking now. If you use RMS by dividing by N-1 instead of N you have an unbiased standard deviation. Or you could not take the square root and you would have MS, which is a variance. You can compare two variances with an F-test and get a p-value for a significance test. Confidence intervals are trickier for variances, but this might help:http://www.milefoot.com/math/stat/ci-variances.htm

Does that make any sense?

Bim

------ Original message------From: Eric FloehrDate: Mon, May 16, 2016 6:56 PMTo: Mailing list for Central Ohio Python User Group (COhPy);Cc: Subject:Re: [CentralOH] OT: Statistician needed
Thanks Bim. I have no idea :-). I'm at the limits of my statistical knowledge...
On Mon, May 16, 2016 at 4:11 PM, Bim Walker <bim at digitalbim.com> wrote:

Can?t you just think of the set of errors as the raw data, and do an independent t-test comparing provider A to provider B? ?(or an anova if you have more than two providers.)

Bim


On May 16, 2016, at 2:59 PM, Eric Floehr <eric at intellovations.com> wrote:
Hey all,
I'm in need of some help with statistics, and if anyone has any thoughts on this, or know someone who could do this, I would appreciate it greatly.
I have a set of errors, normally distributed around 0 error (it's temperature forecast error). You can assume that the sample of forecasts is representative of the entire population (for example, taking 50 strategic locations around the U.S. to represent all U.S. locations).
I then calculate the mean absolute error, and the RMSE. These have some positive value.
What I would like to calculate on the MAE and RMSE is a confidence interval that the population error is within given the sample MAE or RMSE and it's related statistics (sample size, mean error, MAE, RMSE, standard deviation, etc.).
For example, let's say that one provider's RMSE is 3.18 (A) and another's is 3.5 (B). I'd like to know with some confidence that there is (or isn't) a difference between providers (i.e. that provider A confidently has lower error than B).
Currently, the way I'm doing it is using the normative inverse function in Excel:
Lower bound: NORMINV(0.005,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))

Upper bound: NORMINV(0.995,RMSE,STDDEV_RMSE/SQRT(NUMBER_OF_SAMPLES))

as in section 9.18 of:?http://www.saylor.org/site/wp-content/uploads/2012/10/BUS204-Ling-6.2.pdf
But I'm not at all convinced that I'm doing that right, or that it applies in this situation.
Thanks so much!Eric
_______________________________________________
CentralOH mailing list
CentralOH at python.org
https://mail.python.org/mailman/listinfo/centraloh


_______________________________________________
CentralOH mailing list
CentralOH at python.org
https://mail.python.org/mailman/listinfo/centraloh


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From nludban at columbus.rr.com  Mon May 16 22:36:22 2016
From: nludban at columbus.rr.com (Neil Ludban)
Date: Mon, 16 May 2016 22:36:22 -0400
Subject: [CentralOH] OT: Statistician needed
In-Reply-To: <CAJzarMOTubd=zo0UWa8aaVYTaTYnA3ZvO5qedzZhJUdOLB4eQw@mail.gmail.com>
References: <CAJzarMOjUi-hZTnfVVDOo9Zt8pERUQx379S=DWKtTTb6ijuYEg@mail.gmail.com>
 <20160516173514.de2be7c018fb86750709a921@columbus.rr.com>
 <CAJzarMOTubd=zo0UWa8aaVYTaTYnA3ZvO5qedzZhJUdOLB4eQw@mail.gmail.com>
Message-ID: <20160516223622.9dbe71fec491eecf0bb16566@columbus.rr.com>

On Mon, 16 May 2016 18:55:36 -0400
Eric Floehr <eric at intellovations.com> wrote:
> Neil,
> 
> I'm not a statistician at all so I don't know what I should even be asking.
> 
> Basically, I have some RMSE from a set of forecasts. These forecasts are
> from representative locations. I want to know what the range of RMSE would
> be (within some confidence factor) if I had taken the error at *all* the
> locations.
> 
> So when I take a set of forecasts from 50 locations (say each state
> capital, assuming that's representative) within the U.S. and get the RMSE
> from those forecasts and locations. But there are lots more than 50
> locations, so that set of 50 locations is only a sample of all the
> forecasts for the U.S. So that set of 50 is only a sample RMSE, which is
> likely *close* to the actual RMSE if I had taken *all* the locations.
> 
> So when comparing two forecast providers, each with an RMSE, I'm only
> estimating each of those RMSEs for each provider. So that estimate isn't
> the *true* error, and so if I have two providers, and I want to rank order
> them, I want to have some level of confidence that the difference in RMSE
> between them is statistically significant.
> 
> Does that make sense?
> Eric
> 

I'll assume you are calculating statistics for the same time period (eg,
the last 90 days) for each location independently, and collectively for
the 50 representative locations.  I would argue that all you can get
out of this is order of magnitude statistics -- the unmet requirement
is that all the input values (errors, in this case) are independent.  In
reality, everybody is sharing the same data that's input to a small number
of simulation programs and outputs fudged by a moderate number of
meteorologists.

What you could easily do is ask a different question: what percent of
this location's predictions came within a certain number of degrees of
the actual value?  If location A gets 75% within +/- 2 degrees, and B
gets only 40%, there's a significant difference.  I would start with the
standard deviation of the 50 locations as the initial tolerance.

Given a normal mean and stddev calculated using error as the raw data,
the percent of predictions between -tol and +tol is:

(NORMDIST(+tol, mean, stddev, TRUE)
 - NORMDIST(-tol, mean, stddev, TRUE)) * 100%



From miller.eric.t at gmail.com  Tue May 17 09:46:13 2016
From: miller.eric.t at gmail.com (Eric Miller)
Date: Tue, 17 May 2016 09:46:13 -0400
Subject: [CentralOH] yesterdays statistics question
Message-ID: <CAN67YM7gFeqOhcn2uCALR81_2fDN0usQug4rswEGphZ__Wn91A@mail.gmail.com>

I just happen to be sitting next to a real data scientist.  Shared your
problem w him, and he responded w this:
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From miller.eric.t at gmail.com  Tue May 17 09:46:30 2016
From: miller.eric.t at gmail.com (Eric Miller)
Date: Tue, 17 May 2016 09:46:30 -0400
Subject: [CentralOH] yesterdays statistics question
In-Reply-To: <CAN67YM7gFeqOhcn2uCALR81_2fDN0usQug4rswEGphZ__Wn91A@mail.gmail.com>
References: <CAN67YM7gFeqOhcn2uCALR81_2fDN0usQug4rswEGphZ__Wn91A@mail.gmail.com>
Message-ID: <CAN67YM68txgTaF2Lz7V_PqPziVRA=Fg4hVGQpgQN4LD=seWYUQ@mail.gmail.com>

http://stats.stackexchange.com/questions/78079/confidence-interval-of-rmse



On Tue, May 17, 2016 at 9:46 AM, Eric Miller <miller.eric.t at gmail.com>
wrote:

> I just happen to be sitting next to a real data scientist.  Shared your
> problem w him, and he responded w this:
>
>
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From brywilharris at gmail.com  Tue May 17 11:54:45 2016
From: brywilharris at gmail.com (Bryan Harris)
Date: Tue, 17 May 2016 11:54:45 -0400
Subject: [CentralOH] yesterdays statistics question
In-Reply-To: <CAN67YM68txgTaF2Lz7V_PqPziVRA=Fg4hVGQpgQN4LD=seWYUQ@mail.gmail.com>
References: <CAN67YM7gFeqOhcn2uCALR81_2fDN0usQug4rswEGphZ__Wn91A@mail.gmail.com>
 <CAN67YM68txgTaF2Lz7V_PqPziVRA=Fg4hVGQpgQN4LD=seWYUQ@mail.gmail.com>
Message-ID: <CADYFESG3bmW7N0w5VPTA=dMnM56g993VnRUtVkmua+Lx+cvsUw@mail.gmail.com>

As I understand it, the T-Test tells you whether two populations with
normal distributions have a different mean.  If you plot the prediction
errors do they seem to have a normal distribution?  The T-Test checks the
hypothesis:  "These populations have different means."

You probably also ought to do an F-Test.  The F-test checks the hypothesis:
"These populations have different variances."

If you have reasonable sample sizes, and both populations are reasonably
normal (they have a bell curve) then these tests work OK.

Are you doing this for work or pleasure?

Bryan Harris, PE
Research Engineer
Electro-Mechanical Systems
University of Dayton Research Institute
bryan.harris at udri.udayton.edu
http://www.udri.udayton.edu/
(937) 229-5561

On Tue, May 17, 2016 at 9:46 AM, Eric Miller <miller.eric.t at gmail.com>
wrote:

> http://stats.stackexchange.com/questions/78079/confidence-interval-of-rmse
>
>
>
> On Tue, May 17, 2016 at 9:46 AM, Eric Miller <miller.eric.t at gmail.com>
> wrote:
>
>> I just happen to be sitting next to a real data scientist.  Shared your
>> problem w him, and he responded w this:
>>
>>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
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From jep200404 at columbus.rr.com  Sat May 21 20:33:36 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sat, 21 May 2016 20:33:36 -0400
Subject: [CentralOH] =?utf-8?q?2016-05-20_=E9=81=93=E5=A0=B4_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz8gZmlyc3QgcHJvZ3JhbW1pbmcgbGFuZ3VhZ2UgdHVy?=
 =?utf-8?q?tle_ken_robinson_jesse_livermore_moduler_v_remainder_weasel_mes?=
 =?utf-8?q?h_gui_kivy_four-step_process_fluent_python_carpe?=
Message-ID: <20160521203336.2f2638b9.jep200404@columbus.rr.com>

first programming language

    What are the goals for first programming language?
    In other words, what do you want to accomplish with that first language?
    After figuring that out, which language best accomplishes that goal?
    Who would be learning?

What do you think about the following?
Does it change your answers to the above about first programming language?
"The Game for Little Programmers!"
Robot Turtle Board Game
http://www.robotturtles.com/
http://makezine.com/2013/12/11/robot-turtles-teach-programming

Watch Ken Robinson's TED videos.
Does it change your answers to the above about first programming language?

"selling down to the sleeping point"
Speculation as a Fine Art by Dickson G. Watts
wp:Extraordinary Popular Delusions and the Madness of Crowds
wp:Jesse Lauriston Livermore

    All through time, people have basically acted and reacted the same way in
    the market as a result of: greed, fear, ignorance, and hope. That is why
    the numerical formations and patterns recur on a constant basis.

###############################################################################

    ?It is the story of people figuring out how the mind works when it?s faced
    with making investment decisions. How it functions in conditions of
    uncertainty.?

Is Michael Lewis working on a screenplay?

Modulus

Haskell has separate mod and rem operators (functions really).
A Haskell afficionado was surprised at Python's % behavior.
Said afficionado expected behavior like C's.

On Sat May 7 14:00:54 EDT 2016 jep200404 at columbus.rr.com scribbled:

> predict the output
> 3.25 % 3.5, 3.25 % 1, 3.25 % -1, -.25 % 3.5, -.25 % -3.5, .25 % -3.5, .25 % 3.5

Python modulus (is not remainder)
http://stackoverflow.com/questions/3883004/negative-numbers-modulo-in-python
http://stackoverflow.com/questions/43775/modulus-operation-with-negatives-values-weird-thing
http://stackoverflow.com/questions/4432208/how-does-work-in-python
http://stackoverflow.com/questions/13683563/whats-the-difference-between-mod-and-remainder
https://docs.python.org/2/reference/expressions.html

    The modulo operator always yields a result with the same sign
    as its second operand (or zero); the absolute value of the
    result is strictly smaller than the absolute value of the
    second operand.[2]

    [2] While abs(x%y) < abs(y) is true mathematically, for
    floats it may not be true numerically due to roundoff. For
    example, and assuming a platform on which a Python float is
    an IEEE 754 double-precision number, in order that -1e-100 %
    1e100 have the same sign as 1e100, the computed result is
    -1e-100 + 1e100, which is numerically exactly equal to 1e100.
    The function math.fmod() returns a result whose sign matches
    the sign of the first argument instead, and so returns
    -1e-100 in this case. Which approach is more appropriate
    depends on the application.

https://docs.python.org/3/reference/expressions.html

    The % (modulo) operator yields the remainder from the
    division of the first argument by the second. The numeric
    arguments are first converted to a common type. A zero right
    argument raises the ZeroDivisionError exception. The
    arguments may be floating point numbers, e.g., 3.14%0.7
    equals 0.34 (since 3.14 equals 4*0.7 + 0.34.) The modulo
    operator always yields a result with the same sign as its
    second operand (or zero); the absolute value of the result is
    strictly smaller than the absolute value of the second
    operand [1].

    [1] While abs(x%y) < abs(y) is true mathematically, for
    floats it may not be true numerically due to roundoff. For
    example, and assuming a platform on which a Python float is
    an IEEE 754 double-precision number, in order that -1e-100 %
    1e100 have the same sign as 1e100, the computed result is
    -1e-100 + 1e100, which is numerically exactly equal to 1e100.
    The function math.fmod() returns a result whose sign matches
    the sign of the first argument instead, and so returns
    -1e-100 in this case. Which approach is more appropriate
    depends on the application.

modulus versus remainder

    As far as I can see, Python is unusual in that it uses % for
    modulus; Fortran, C/C++, and Java use % to mean remainder.

wp:Modulo operation

foo d = 3 + mod (-d) 7
map foo [0..6]

tortoise & hare:
hare: fast and wrong
tortoise: slow and correct
people often forget which got to the finish line first

wp:1944 (song)

Pop goes the weasel
https://www.sciencenews.org/blog/science-ticker/weasel-has-shut-down-large-hadron-collider

5 rules for avoiding burnout
https://opensource.com/business/16/5/5-rules-avoiding-burnout

Patch now: Google and JetBrains warn developers of buggy IDE
http://www.theregister.co.uk/2016/05/18/patch_now_google_and_jetbrains_warn_developers_of_buggy_ide/

Like Uber for Wireless?
https://medium.com/uber-for-x/like-uber-for-wireless-dc59d4bed08c

3 open source Python GUI frameworks
https://opensource.com/life/16/5/open-source-python-gui-frameworks
PyQt
Tkinter
WxPython

Kivy is multi-touch and works on mobile devices?

hteck.ca
four-step process
http://www.hteck.ca/motor/s-motor_wire/stepper-motor.html

likes and recommends
Fluent Python
http://shop.oreilly.com/product/0636920032519.do

A 5-step process for hiring tech talent
https://opensource.com/life/16/5/oscon-bitnami-erica-brescia

wp:Tetris
wp:viral
wp:chiral

Pentacubes: Puzzles & Solutions
http://puzzler.sourceforge.net/docs/pentacubes.html

wp:Pentomino
wp:Solomon W. Golomb
wp:John Horton Conway

It is amazing that Penrose tiling was not discovered long ago,
leaving the hope that there are many simple things like this
waiting to be discovered.
wp:Penrose tiling
wp:Roger Penrose

Biki:ni Pencil
http://moonpaste.net/stmg/cgi-bin/moonwiki/wiki.cgi?bikini
one has to handle and operate this to appreciate it

Raspberry Pis feature Python.
Check out local Raspberry Pi and Arduino group.
Links and mailing list at colug.net/carpe

From jep200404 at columbus.rr.com  Sat May 21 21:50:38 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sat, 21 May 2016 21:50:38 -0400
Subject: [CentralOH] 2016-05-18 Napkin Scribbles from Aab: First Programming
 Language C# Indentation BASIC Montessori LOGO School of Fish
Message-ID: <20160521215038.03b97b8c.jep200404@columbus.rr.com>

seven folks

First programming language
    What do you want in a first programming language?

    college professor:
        having taught C# and gotten much code with inconsistent indentation,
        dearly loves Python for forcing code to have good indentation

    long time geek:
        BASIC

A Montessori school is teaching programming with LOGO?
where each instruction is on a separate physical card in a stack of cards?
acted out by kids?
(no computer involved)!!!?

Montessori school of fish

From jep200404 at columbus.rr.com  Sat May 21 21:59:00 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sat, 21 May 2016 21:59:00 -0400
Subject: [CentralOH] 2016-04-27 Napkin Scribbles from Nazareth Restaurant &
 Deli
Message-ID: <20160521215900.0e465f3d.jep200404@columbus.rr.com>

nazareth deli had few folks at first, but filled up later

CARPE - Columbus Arduino Raspberry Pi Enthusiasts
start at colug.net/carpe

From eric at intellovations.com  Sat May 21 22:25:31 2016
From: eric at intellovations.com (Eric Floehr)
Date: Sat, 21 May 2016 22:25:31 -0400
Subject: [CentralOH] Python Hype Survey
Message-ID: <CAJzarMMkweCrbw8nAjE1UoD0bUpNdwPbfsnsC49Lmm=aSyLtUA@mail.gmail.com>

All,

Could you please take the time to fill out Brian Ray's Python Hype
Survey... Brian is a core contributor to Python and is giving a talk about
the hype surrounding Python and has asked everyone to share a survey about
Python hype that he will then analyze and present at PyCon:

https://www.surveymonkey.com/r/python_hype_o

Thanks!
Eric
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From jep200404 at columbus.rr.com  Sun May 22 16:08:41 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Sun, 22 May 2016 16:08:41 -0400
Subject: [CentralOH] 2016-05-25 11:30 Wednesday Python Lunch at Grandview
 Aladdin's
Message-ID: <20160522160841.55788a74.jep200404@columbus.rr.com>

Wednesday Python Lunch at Grandview Aladdin's
May 25, 2016, 11:30 a.m.

Aladdin's Eatery[1]
1423(B) Grandview Ave[2]
Columbus, OH 43212

We'll be meeting for good food and good company.
Join us to talk Python, programming, or anything else!

[1] http://www.aladdinseatery.com/
[2] http://www.openstreetmap.org/node/2323769991

From adam.johnson1733 at gmail.com  Mon May 23 09:40:37 2016
From: adam.johnson1733 at gmail.com (adam johnson)
Date: Mon, 23 May 2016 08:40:37 -0500
Subject: [CentralOH] Python Opportunity_Cincinnati
Message-ID: <D5481A50-1299-4E3F-8D60-AF950087CEB9@gmail.com>

All,

I have an immediate need in West Chester for a back end developer. Feel free to give me a call or shoot me a message. I can be reached at 513-266-5820.

Thanks,
Adam Johnson 
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From eric at intellovations.com  Mon May 23 10:04:30 2016
From: eric at intellovations.com (Eric Floehr)
Date: Mon, 23 May 2016 10:04:30 -0400
Subject: [CentralOH] 2016-05-25 11:30 Wednesday Python Lunch at
 Grandview Aladdin's
In-Reply-To: <20160522160841.55788a74.jep200404@columbus.rr.com>
References: <20160522160841.55788a74.jep200404@columbus.rr.com>
Message-ID: <CAJzarMPKwP7X-p9ErGW1ho9NQyyWEr7oWNmw-29XhBBNNcHVJw@mail.gmail.com>

RSVP Here:
http://www.meetup.com/Central-Ohio-Python-Users-Group/events/231336452/



On Sun, May 22, 2016 at 4:08 PM, <jep200404 at columbus.rr.com> wrote:

> Wednesday Python Lunch at Grandview Aladdin's
> May 25, 2016, 11:30 a.m.
>
> Aladdin's Eatery[1]
> 1423(B) Grandview Ave[2]
> Columbus, OH 43212
>
> We'll be meeting for good food and good company.
> Join us to talk Python, programming, or anything else!
>
> [1] http://www.aladdinseatery.com/
> [2] http://www.openstreetmap.org/node/2323769991
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From jep200404 at columbus.rr.com  Tue May 24 19:09:23 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Tue, 24 May 2016 19:09:23 -0400
Subject: [CentralOH] First Programming Language
Message-ID: <20160524190923.627f25c6.jep200404@columbus.rr.com>

What does one want of a first programming language?











































Watch Ken Robinson videos and read Zen and the Art of Motorcycle Maintainance.

From kurtis.mullins at gmail.com  Tue May 24 22:08:09 2016
From: kurtis.mullins at gmail.com (Kurtis Mullins)
Date: Tue, 24 May 2016 22:08:09 -0400
Subject: [CentralOH] First Programming Language
In-Reply-To: <20160524190923.627f25c6.jep200404@columbus.rr.com>
References: <20160524190923.627f25c6.jep200404@columbus.rr.com>
Message-ID: <195CB49F-334A-43A7-A6F7-D02038059EE5@gmail.com>

I'm split between a language where you can dive in and get stuff done (e.g. Python) and a "retro" language where you actually learn how computers work in the process (e.g. C). I wasn't exposed to important principles until college and wished I had know them for years. Also, if I never went to college would I have been exposed to them?

My son just turned 8 and I've exposed him to Python but had more luck with Tynker (graphical). Maybe this summer off school we can do some "real" coding together

Sent from my iPhone

> On May 24, 2016, at 7:09 PM, jep200404 at columbus.rr.com wrote:
> 
> What does one want of a first programming language?
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Watch Ken Robinson videos and read Zen and the Art of Motorcycle Maintainance.
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh

From herrold at owlriver.com  Wed May 25 13:56:45 2016
From: herrold at owlriver.com (R P Herrold)
Date: Wed, 25 May 2016 13:56:45 -0400 (EDT)
Subject: [CentralOH] teaching new coders ...
Message-ID: <alpine.LRH.2.03.1605251343370.29372@bjyevire.pbz>


discussed at lunch today

http://www.wsj.com/articles/if-your-teacher-sounds-like-a-robot-you-might-be-on-to-something-1462546621


On Tue, 17 May 2016, ... wrote:

> What tasks does a teaching ass't do that students couldn't 
> figure out a robot was doing them?

in the particular case of a coding / programming course, the 
'get support' was probably structured in a fashion of:
	upload your 'misbehaving' code, and any error messages

and then the software mailing back either a more specific 
explanation of any error message; a review for obvious 
'thinko's' (such tools exist); or a 'tell me more' reply

Eventually under the Socratic method, the student has to think 
and engage their intellect to actually READ what the message 
is saying, rather than 'projecting' what they though it was 
saying at a casual glance

see eg: 
	https://en.wikipedia.org/wiki/ELIZA

I have trained junior coders over the years over and over 
again, and the 'default' response I have to any question in 
the first instance is usually:
	what does the documentation say?

because until the student is reading the documentation, they 
are not yet using research skills and learning, but rather 
just seeking a tactical 'quick fix' which tries to gloss over 
a lack of understanding
	https://wiki.centos.org/SpoonFeed

esp para 3 and four, and later

-- Russ herrold

From jep200404 at columbus.rr.com  Thu May 26 11:02:40 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Thu, 26 May 2016 11:02:40 -0400
Subject: [CentralOH] 2016-06-02 11:30 Thursday Python Lunch at Jie's Good
 Tasting
Message-ID: <20160526110240.0bdd4a99.jep200404@columbus.rr.com>

Thursday Python Lunch at Jie's Good Tasting
2016-06-02 11:30

Jie's Good Tasting[1]
1413 Grandview Ave[2]
Columbus, OH 43212

We'll be meeting for good food and good company.
Join us to talk Python, programming, or anything else! 

[1] http://www.jiesgoodtasting.com/
[2] http://www.jiesgoodtasting.com/location.aspx

From lenjaffe at jaffesystems.com  Thu May 26 11:43:18 2016
From: lenjaffe at jaffesystems.com (Len Jaffe)
Date: Thu, 26 May 2016 11:43:18 -0400
Subject: [CentralOH] First Programming Language
In-Reply-To: <195CB49F-334A-43A7-A6F7-D02038059EE5@gmail.com>
References: <20160524190923.627f25c6.jep200404@columbus.rr.com>
 <195CB49F-334A-43A7-A6F7-D02038059EE5@gmail.com>
Message-ID: <CAO_bo77wDDYnVwT78e2BrdJUQduzK+zr7=paAFoXhMC=uM_3Zw@mail.gmail.com>

There's something to be said for Pascal as a teaching language. It has data
types, strict typing, pointers and all of the major procedural looping
constructs.
Once all of those elements are learned, one can change to a dynamic
language, or an OO language, or a functional language.

I'm a fan of constraining the learner at first, especially since there's a
lot more learning involved with the "first language" beyond syntax and
grammar.
If you can't work out a sorting algorithm on graph paper, learning a
dynamic/oo/functional programming language won't help, and might hinder.

But really, two or three weeks in Pascal's handcuffs should be sufficient
to learn the first principle of "computer programming"

On Tue, May 24, 2016 at 10:08 PM, Kurtis Mullins <kurtis.mullins at gmail.com>
wrote:

> I'm split between a language where you can dive in and get stuff done
> (e.g. Python) and a "retro" language where you actually learn how computers
> work in the process (e.g. C). I wasn't exposed to important principles
> until college and wished I had know them for years. Also, if I never went
> to college would I have been exposed to them?
>
> My son just turned 8 and I've exposed him to Python but had more luck with
> Tynker (graphical). Maybe this summer off school we can do some "real"
> coding together
>
> Sent from my iPhone
>
> > On May 24, 2016, at 7:09 PM, jep200404 at columbus.rr.com wrote:
> >
> > What does one want of a first programming language?
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Watch Ken Robinson videos and read Zen and the Art of Motorcycle
> Maintainance.
> > _______________________________________________
> > CentralOH mailing list
> > CentralOH at python.org
> > https://mail.python.org/mailman/listinfo/centraloh
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>



-- 
Len Jaffe - Information Technology Smoke Jumper - lenjaffe at jaffesystems.com
614-404-4214    @LenJaffe <https://www.twitter.com/lenJaffe>
www.lenjaffe.com
Host of Code Jam Columbus <http://www.meetup.com/techlifecolumbus/>  -
@CodeJamCMH <https://www.twitter.com/CodeJamCMH>
Curator of Advent Planet <http://www.lenjaffe.com/AdventPlanet/> - An
Aggregation of Online Advent Calendars.
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From joe at joeshaw.org  Thu May 26 12:01:07 2016
From: joe at joeshaw.org (Joe Shaw)
Date: Thu, 26 May 2016 12:01:07 -0400
Subject: [CentralOH] First Programming Language
In-Reply-To: <CAO_bo77wDDYnVwT78e2BrdJUQduzK+zr7=paAFoXhMC=uM_3Zw@mail.gmail.com>
References: <20160524190923.627f25c6.jep200404@columbus.rr.com>
 <195CB49F-334A-43A7-A6F7-D02038059EE5@gmail.com>
 <CAO_bo77wDDYnVwT78e2BrdJUQduzK+zr7=paAFoXhMC=uM_3Zw@mail.gmail.com>
Message-ID: <CAOxvq7ydSfBD6pwXKcR3yyEjhGd6QArBNtA_+zEJSVnWOjBa9w@mail.gmail.com>

Hi,

On Thu, May 26, 2016 at 11:43 AM, Len Jaffe <lenjaffe at jaffesystems.com>
wrote:

> There's something to be said for Pascal as a teaching language. It has
> data types, strict typing, pointers and all of the major procedural looping
> constructs.
>

Go might be a more modern stand-in for Pascal.  While influenced by C
syntactically -- curly braces and such -- it's also largely inspired by
Pascal descendants like Modula and Oberon.

If you're into the "etymology" of programming languages, an interesting
talk about this was given by one of Go's designers last year.
https://talks.golang.org/2015/gophercon-goevolution.slide

I have a soft spot in my heart for Pascal.  After learning Basic as a kid
it was my first real programming language.

Once all of those elements are learned, one can change to a dynamic
> language, or an OO language, or a functional language.
>
> I'm a fan of constraining the learner at first, especially since there's a
> lot more learning involved with the "first language" beyond syntax and
> grammar.
> If you can't work out a sorting algorithm on graph paper, learning a
> dynamic/oo/functional programming language won't help, and might hinder.
>

I guess it depends on what your goal for learning to program is.  Are you
looking to just have fun and play around, or do you want to become a
serious programmer and make a career out of it?  I'd argue that a sorting
algorithm isn't important for the former, so a language that "gets out of
the way" in many respects is a better starting place for them.  I think
Python fits very well here.

Joe


>

>
> But really, two or three weeks in Pascal's handcuffs should be sufficient
> to learn the first principle of "computer programming"
>
> On Tue, May 24, 2016 at 10:08 PM, Kurtis Mullins <kurtis.mullins at gmail.com
> > wrote:
>
>> I'm split between a language where you can dive in and get stuff done
>> (e.g. Python) and a "retro" language where you actually learn how computers
>> work in the process (e.g. C). I wasn't exposed to important principles
>> until college and wished I had know them for years. Also, if I never went
>> to college would I have been exposed to them?
>>
>> My son just turned 8 and I've exposed him to Python but had more luck
>> with Tynker (graphical). Maybe this summer off school we can do some "real"
>> coding together
>>
>> Sent from my iPhone
>>
>> > On May 24, 2016, at 7:09 PM, jep200404 at columbus.rr.com wrote:
>> >
>> > What does one want of a first programming language?
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > Watch Ken Robinson videos and read Zen and the Art of Motorcycle
>> Maintainance.
>> > _______________________________________________
>> > CentralOH mailing list
>> > CentralOH at python.org
>> > https://mail.python.org/mailman/listinfo/centraloh
>> _______________________________________________
>> CentralOH mailing list
>> CentralOH at python.org
>> https://mail.python.org/mailman/listinfo/centraloh
>>
>
>
>
> --
> Len Jaffe - Information Technology Smoke Jumper -
> lenjaffe at jaffesystems.com
> 614-404-4214    @LenJaffe <https://www.twitter.com/lenJaffe>
> www.lenjaffe.com
> Host of Code Jam Columbus <http://www.meetup.com/techlifecolumbus/>  -
> @CodeJamCMH <https://www.twitter.com/CodeJamCMH>
> Curator of Advent Planet <http://www.lenjaffe.com/AdventPlanet/> - An
> Aggregation of Online Advent Calendars.
>
>
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
>
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From eric at intellovations.com  Thu May 26 13:46:39 2016
From: eric at intellovations.com (Eric Floehr)
Date: Thu, 26 May 2016 13:46:39 -0400
Subject: [CentralOH] 2016-06-02 11:30 Thursday Python Lunch at Jie's
 Good Tasting
In-Reply-To: <20160526110240.0bdd4a99.jep200404@columbus.rr.com>
References: <20160526110240.0bdd4a99.jep200404@columbus.rr.com>
Message-ID: <CAJzarMOj_o=M_x5Y+FTz5Yz4a1To766GfPAXm1dk7kiMfPt-zw@mail.gmail.com>

RSVP Here:
http://www.meetup.com/Central-Ohio-Python-Users-Group/events/231423522/



On Thu, May 26, 2016 at 11:02 AM, <jep200404 at columbus.rr.com> wrote:

> Thursday Python Lunch at Jie's Good Tasting
> 2016-06-02 11:30
>
> Jie's Good Tasting[1]
> 1413 Grandview Ave[2]
> Columbus, OH 43212
>
> We'll be meeting for good food and good company.
> Join us to talk Python, programming, or anything else!
>
> [1] http://www.jiesgoodtasting.com/
> [2] http://www.jiesgoodtasting.com/location.aspx
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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From lenjaffe at jaffesystems.com  Thu May 26 16:01:05 2016
From: lenjaffe at jaffesystems.com (Len Jaffe)
Date: Thu, 26 May 2016 16:01:05 -0400
Subject: [CentralOH] First Programming Language
In-Reply-To: <CAOxvq7ydSfBD6pwXKcR3yyEjhGd6QArBNtA_+zEJSVnWOjBa9w@mail.gmail.com>
References: <20160524190923.627f25c6.jep200404@columbus.rr.com>
 <195CB49F-334A-43A7-A6F7-D02038059EE5@gmail.com>
 <CAO_bo77wDDYnVwT78e2BrdJUQduzK+zr7=paAFoXhMC=uM_3Zw@mail.gmail.com>
 <CAOxvq7ydSfBD6pwXKcR3yyEjhGd6QArBNtA_+zEJSVnWOjBa9w@mail.gmail.com>
Message-ID: <CAO_bo74q1HZDvopRJ2joq=X0jjFDgwpdEiME7SN_HhK+ZQTZmQ@mail.gmail.com>

On Thu, May 26, 2016 at 12:01 PM, Joe Shaw <joe at joeshaw.org> wrote:

>
>
> On Thu, May 26, 2016 at 11:43 AM, Len Jaffe <lenjaffe at jaffesystems.com>
> wrote:
>
>>
>>
>> I'm a fan of constraining the learner at first, especially since there's
>> a lot more learning involved with the "first language" beyond syntax and
>> grammar.
>> If you can't work out a sorting algorithm on graph paper, learning a
>> dynamic/oo/functional programming language won't help, and might hinder.
>>
>
> I guess it depends on what your goal for learning to program is.  Are you
> looking to just have fun and play around, or do you want to become a
> serious programmer and make a career out of it?  I'd argue that a sorting
> algorithm isn't important for the former, so a language that "gets out of
> the way" in many respects is a better starting place for them.  I think
> Python fits very well here.
>

A sorting algorithm uses non-scalar data structures, looping, flow control
(if/then), plus maybe input and output:
All of those concepts are important to learn whether you want to be a fool
around or have a career.
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From jep200404 at columbus.rr.com  Thu May 26 16:37:31 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Thu, 26 May 2016 16:37:31 -0400
Subject: [CentralOH] =?utf-8?q?2016-03-28_=E6=9C=83=E8=AD=B0_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz86IGlzbGljZSBuYWtlZCBleGNlcHQ6IGNsYXVzZXMg?=
 =?utf-8?q?are_bad_pi3_leap_day_challenge_jason_green_sh_samuel_rivera_bab?=
 =?utf-8?q?y_learning_ethan_dicks_python_on_rpi_mike_rehner_ubuntu_make_er?=
 =?utf-8?q?ic_floehr_comprehensions_built-in_functions_brian_costlow_pyohi?=
 =?utf-8?q?o_2016_linking_wizard?=
Message-ID: <20160526163731.19a25f5c.jep200404@columbus.rr.com>

Thanks to Pillar for hosting us.

PyOhio is July 30, 31 2016.

32 folks

Pi3 is announced
ARMv8, quad core, 1.2 GHz, 1GB RAM, wifi b/g/n, bluetooth, $35
http://linuxgizmos.com/quad-core-64-bit-pi-3-is-official-with-wifi-bt-and-35-price/
http://news.softpedia.com/news/raspberry-pi-3-officially-released-ten-time-more-powerful-than-original-model-501125.shtml
http://fossforce.com/2016/02/official-raspberry-pi-3/
http://lxer.com/module/newswire/view/226426/

The Simple Truth About What Xamarin Was All Along to Microsoft,
Just Like Ximian and Novell (Post-Patent Deal)
http://techrights.org/2016/02/28/xamarin-ximian-and-novell/

SCO vs. IBM looks like it's over for good
http://www.theregister.co.uk/2016/02/29/sco_vs_ibm_over/

Confirmed: IBM slurps up Bruce Schneier with Resilient purchase
http://www.theregister.co.uk/2016/02/29/confirmed_ibm_slurps_up_bruce_schneier_with_resilient_purchase/

Old Boy
Play Misty For Me
The Producers
    http://www.breitbart.com/big-hollywood/2016/02/29/watch-nathan-lane-matthew-broderick-mock-trump-supporters-jimmy-kimmel-live/

subbed, not dubbed
    (read subtitles instead of dubbing in English)
wp:The Way of the Gun
wp:Brotherhood of the Wolf
bar.foo
    google owns .foo domain?
google foobar recruiting
google cardboard

Michael
Quantopia
    pays coders a cut of 
    http://www.quantopia.net/
    wp:Quantopian
    test on their system
Bourne shell's pipe beats Python all to heck
toolz.pipe

wp:Freaknik

GitHubber wants to revive the first Unix in a PDP-7 emulator
http://www.theregister.co.uk/2016/02/29/githubber_wants_to_revive_the_first_unix_in_a_pdp7_emulator/

Does Disney have openings for Python talent?
http://www.breitbart.com/immigration/2016/02/29/disney-worker-american-father-forced-to-retrain-foreign-hires-it-was-torture/

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Leap Day Challenge
write Python code to figure out when next COhPy meeting is on a leap day

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Jason Green 10 minute lightning talk on sh module

    See github.com/gjigsaw for ipynb file of this presentation.
    Ask him for it if you don't see it.

    module: sh
    author: Andrew Moffat
    source: https://github.com/amoffat/sh
    docs: https://amoffat.github.io/sh

    # pip install sh
    import sh

    sh.ls()
    sh.ls('-l')
    sh.pip('install', 'pytest')
    !py.test --help
    sy.py.test  # This does not work, so:
    sh.Command('py.test')('--help')  # This works.
    sh.Command('/bin/ls')('-alh')
    lscmd = sh.Command('/bin/ls')  # Compare to functools.partial().
    lscmd('-alh')
    sh.df('-T', '--block-size', '1G')  # Last two arguments are associated.
    sh.df('-T', blocksize='1G')  # This shows meaning of '1G' better.
    sh.sleep(3)  # this blocks.
    print('delayed')
    sh.sleep(3, bg=True)  # This does not block.
    print('immediate')
    sh.sort(sh.du(sh.glob('*'), '-sb'), '-rn') # pipe (ugly syntax)
    import toolz
    sh.wc(sh.ls('/etc', '-l'), '-l')
    sh.git.init('foo')  # Access sub-commands via dot notation.
    output = sh.ls('/')
    output.exit_code  # See exit codes.
    sh.ls('*.ipynb')  # Fails, because ls does not grok globs.
    sh.ls(sh.glob('*.ipynb'))  # This works.
    lslah = sh.ls.bake('-lah')  # Bake (ala partial) an argument into command.
    lslah('/')
    # See https://amoffat.github.io/sh
    # Works on Linux and OSX only. (No MS Windows)

    ipython notebook with reveal.js and rise

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Samuel Rivera

    post-doc reasearcher for a few more weeks
    Sam presented about tracking babies' eyes to infer when they learn.
        learn categories: three months old
        first speech: 12 months old
        vocabulary spurt: 18 months
        how do labels or words affect category learning?
        babies are too young to say what they are thinking, so track eyes
    Modeling category learning dynamics with Self Organizing Maps (with Python)
    categories and words
        e.g., cats and living things
    Plunkett: labels could override what categories you learn
    Plunkett, Hu, & Cohen, 2008
    Gliozzi labels as features
        unsupervised feature-based learning of the categories using
        SOM: self organizing maps
    github.com/JustGlowing/minisom
    https://github.com/sriveravi/som    
        does not follow PEP8
    http://samuelrivera.co/
    sriveravi at gmail.com
    sriveravi.github.io

    exemplar

    likes Python
        sexy language
        can keep using after school because it's free
        sharing culture (like academia)
            wp:The Cathedral and the Bazaar
            
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Ethan Dicks

    next month will show Raspberry Pi stuff that uses Python

    Pi Zero with Sense Hat
    Pi 3 released today: has wifi & bluetooth for $35

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Mike Rehner

    Easy way to install whole bunch of Python stuff in Ubuntu.
    Ubuntu Make will install fat Python

    install personal package archive (ppa)
    https://wiki.ubuntu.com/ubuntu-make
    https://github.com/ubuntu/ubuntu-make

    do:
        Ubuntu == 16.04:

            sudo apt-get install ubuntu-make

        Ubuntu < 16.04:

            sudo add-apt-repository ppa:ubuntu-desktop/ubuntu-make
            sudo apt-get update
            sudo apt-get install ubuntu-make

    java was not installed on his machine

    umake --h

    umake ide phcharm

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Eric Floehr

    show comprehensions and some built-in functions
    min(), max(), any(), all(), sum()

    mkvirtualenv 201502cohpy
    workon 201502cohpy
    jupyter notebook

    weatherunderground api
    wunderground.com/weather/api/?MR=1

    When catching exceptions, mention specific exceptions whenever possible
    instead of using a bare  except:  clause.

    yes:

        try:
            # Python2
            import urllib2
        except ImportError:  # That ImportError is important.
            # Python2
            import urllib.request as urllib2

    no:

        try:
            # Python2
            import urllib2
        except:  # That ImportError is important.
            # Python2
            import urllib.request as urllib2

    comprehensions

        list
        set
        dictionary
        generator expression (not really a comprehension)

    To get n'th item of a generator, use islice from itertools.

    Please post the jupyter notebook on github.com/cohpy.

        (redact api keys or passwords)

    What year is the next Leap Day COhPy meeting?
    Solve with Python.
    Mail your code to eric at intellovations.com.

    Someone has been slack in getting PyOhio web site up for 2016.
    Still says August 1-2, 2015.

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

Brian Costlow

    PyOhio 2016

    main days are July 30 and 31, 2016.
    CFP will go out in March
    Want beginners to fill about 1/3 of slots.

    Social gathering on Monday at Linking Wizard.
    Linking Wizard is at Fifth Ave and Grandview Ave.

From jep200404 at columbus.rr.com  Thu May 26 18:27:18 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Thu, 26 May 2016 18:27:18 -0400
Subject: [CentralOH] 2016-05-25 Aladdin's Eatery Napkin Scribbles: mole day
 1425 one minute manager monkeys spoonfeeding shell fortran salt ken
 robinson zmm
Message-ID: <20160526182718.1560cc2b.jep200404@columbus.rr.com>

sat outside due to good weather
siren at noon

Mole Day in June?
Mole Day in October!
wp:Mole Day

both doors are 1425 not 1423

One Minute Manager
meets the monkeys.

spoonfeeding

shell
fortran

flavor savor
over 2000 milligrams sodium
http://www.aladdinseatery.com/wp-content/uploads/2014/07/NUTRITION-SPREADSHEET-Update-2014.pdf

http://www.wsj.com/articles/if-your-teacher-sounds-like-a-robot-you-might-be-on-to-something-1462546621

Watch Ken Robinson videos.
Read "Zen and the Art of Motorcycle Maintainance".

From jep200404 at columbus.rr.com  Thu May 26 18:33:16 2016
From: jep200404 at columbus.rr.com (jep200404 at columbus.rr.com)
Date: Thu, 26 May 2016 18:33:16 -0400
Subject: [CentralOH] 
 =?utf-8?q?2016-02-29_=E6=9C=83=E8=AD=B0_Scribbles_?=
 =?utf-8?b?76SY5pu4L+aDoeaWhz86IGlzbGljZSBuYWtlZCBleGNlcHQ6IGNsYXVzZXMg?=
 =?utf-8?q?are_bad_pi3_leap_day_challenge_jason_green_sh_samuel_rivera_bab?=
 =?utf-8?q?y_learning_ethan_dicks_python_on_rpi_mike_rehner_ubuntu_make_er?=
 =?utf-8?q?ic_floehr_comprehensions_built-in_functions_brian_costlow_pyohi?=
 =?utf-8?q?o_2016_linking_wizard?=
In-Reply-To: <20160526163731.19a25f5c.jep200404@columbus.rr.com>
References: <20160526163731.19a25f5c.jep200404@columbus.rr.com>
Message-ID: <20160526183316.1b5b9630.jep200404@columbus.rr.com>

On Thu, 26 May 2016 16:37:31 -0400, jep200404 at columbus.rr.com wrote:

> Subject: [CentralOH] 2016-03-28 ?? Scribbles ??/???: ...

Oops. Of course I meant 2016-02-29, not 2016-03-28.