From cbc at unc.edu  Wed Mar  2 17:28:40 2016
From: cbc at unc.edu (Chris Calloway)
Date: Wed, 2 Mar 2016 17:28:40 -0500
Subject: [TriPython] Thanks For Project Night Help
Message-ID: <56D76918.2040608@unc.edu>

I want everyone to know that Kevin Howell helped me at project night 
last night. I had a problem with Jupyter's nbconvert subcommand that had 
been vexing me and was not yielding to my attempts to tame it. Kevin 
brought a different perspective to the problems and found not just a 
solution, but the right solution.

Kevin, just wanted you to know I've now gone on to figure out how to do 
other reveal themes with nbconvert as well as how to create new 
nbconvert templates to take advantage of those themese. You were right. 
The templates are Jinja.

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From aikimark at aol.com  Wed Mar  2 22:43:44 2016
From: aikimark at aol.com (Mark Hutchinson)
Date: Wed, 2 Mar 2016 22:43:44 -0500
Subject: [TriPython] update
Message-ID: <1533a92fbdb-158-4418@webstg-m05.mail.aol.com>

I added a Set() version of the stopwords list to my performance test.  It is slightly faster than a dictionary.


I've updated the files associated with my lightning talk

https://github.com/aikimark/TriPython-2016-02-25-Lightning-Talk



Mark
-------------- next part --------------
   I added a Set() version of the stopwords list to my performance test. ?It
   is slightly faster than a dictionary.
   I've updated the files associated with my lightning talk
   https://github.com/aikimark/TriPython-2016-02-25-Lightning-Talk
   Mark

From kevin at kahowell.net  Wed Mar  2 23:12:34 2016
From: kevin at kahowell.net (Kevin Howell)
Date: Wed, 2 Mar 2016 23:12:34 -0500
Subject: [TriPython] Thanks For Project Night Help
In-Reply-To: <56D76918.2040608@unc.edu>
References: <56D76918.2040608@unc.edu>
Message-ID: <CAKcyUUDTo6fC-BYoCAyGUjiffYuZeM4YHT-hCUh3qDPBRwp-=Q@mail.gmail.com>

Glad to help! :-)

Kevin
On Mar 2, 2016 5:29 PM, "Chris Calloway" <cbc at unc.edu> wrote:

> I want everyone to know that Kevin Howell helped me at project night last
> night. I had a problem with Jupyter's nbconvert subcommand that had been
> vexing me and was not yielding to my attempts to tame it. Kevin brought a
> different perspective to the problems and found not just a solution, but
> the right solution.
>
> Kevin, just wanted you to know I've now gone on to figure out how to do
> other reveal themes with nbconvert as well as how to create new nbconvert
> templates to take advantage of those themese. You were right. The templates
> are Jinja.
>
> --
> Sincerely,
>
> Chris Calloway, Applications Analyst
> UNC Renaissance Computing Institute
> 100 Europa Drive, Suite 540, Chapel Hill, NC 27517
> (919) 599-3530
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
>
-------------- next part --------------
   Glad to help! :-)

   Kevin

   On Mar 2, 2016 5:29 PM, "Chris Calloway" <[1]cbc at unc.edu> wrote:

     I want everyone to know that Kevin Howell helped me at project night
     last night. I had a problem with Jupyter's nbconvert subcommand that had
     been vexing me and was not yielding to my attempts to tame it. Kevin
     brought a different perspective to the problems and found not just a
     solution, but the right solution.

     Kevin, just wanted you to know I've now gone on to figure out how to do
     other reveal themes with nbconvert as well as how to create new
     nbconvert templates to take advantage of those themese. You were right.
     The templates are Jinja.

     --
     Sincerely,

     Chris Calloway, Applications Analyst
     UNC Renaissance Computing Institute
     100 Europa Drive, Suite 540, Chapel Hill, NC 27517
     [2](919) 599-3530
     _______________________________________________
     TriZPUG mailing list
     [3]TriZPUG at python.org
     [4]https://mail.python.org/mailman/listinfo/trizpug
     [5]http://tripython.org is the Triangle Python Users Group

References

   Visible links
   1. mailto:cbc at unc.edu
   2. file:///tmp/tel:%28919%29%20599-3530
   3. mailto:TriZPUG at python.org
   4. https://mail.python.org/mailman/listinfo/trizpug
   5. http://tripython.org/

From philip at semanchuk.com  Thu Mar  3 19:29:34 2016
From: philip at semanchuk.com (Philip Semanchuk)
Date: Thu, 3 Mar 2016 19:29:34 -0500
Subject: [TriPython] GDB Presentation
In-Reply-To: <56D0E0B7.80506@unc.edu>
References: <56D0E0B7.80506@unc.edu>
Message-ID: <7EF6A229-48FC-4A10-86D0-B0779786E35C@semanchuk.com>


> On Feb 26, 2016, at 6:33 PM, Chris Calloway <cbc at unc.edu> wrote:
> 
> Brian Bouterse's presentation, Debugging Hung Python Processes With GDB, is available here:
> 
> http://tripython.org/meetings/Debugging_Hung_Python_Processes_with_GDB.pdf
> 
> There is a link on this page under the heading for the meeting last night:
> 
> http://tripython.org/meetings
> 
> Thank you, Brian!


I want to send a personal thank you to Brian for this, because it got me on the right track to find the FreeBSD kernel bug that was hanging the tests for my posix_ipc module. 

(The bug was found and fixed back in January.) 

Cheers
Philip

From lchabot at caktusgroup.com  Mon Mar  7 13:52:58 2016
From: lchabot at caktusgroup.com (Liza Chabot)
Date: Mon, 7 Mar 2016 13:52:58 -0500
Subject: [TriPython] Job Posting: 2016 Summer Django Web Development Intern
Message-ID: <CAKg74Zvc7FkDHY5bvgRiXzo_W_uM-DT66-bxuTmaABm_xicGcQ@mail.gmail.com>

2016 Summer Django Web Development Intern
Location: Durham, North Carolina, United States
Full-time

Caktus builds web and mobile apps with Django. We?ve built over 100 custom
solutions that have reached more than 70 million people globally. Join our
sharp team and be part of an open, collaborative culture that puts quality
at the heart of each project. We?re passionate about solving complex
challenges especially when they have a social impact. In addition to
building the world?s first SMS voter registration project in Libya, we?ve
also built applications for InDemand, Discovery, PBS, Mozilla, and UNICEF.

Come be a part of a small team of developers and designers passionate about
creating fun and interactive web applications. Caktus is looking for
someone who is excited about emerging technologies, creating compelling web
applications and enjoys writing Python. As a member of the Caktus team,
you?ll be involved in every aspect of development, from brainstorming, to
prototyping, to front-end HTML/CSS and Django development. You?ll learn and
collaborate directly with a great group of talented developers and
designers.



*This spring experience includes:*


   - *Position*: A 12-week full-time summer internship in Durham, NC
   - *Exposure*: Great experience and education in current web development
   techniques and technologies.
   - *Mentorship*: At Caktus, you?ll get to work with some of the best and
   brightest minds in the local web development community


*As a Django Web Developer Intern, you will:*

   - Work collaboratively with the development team to learn about the
   Caktus development process
   - Become familiar with using current distributed version control systems
   (e.g. git and mercurial) effectively in a team environment
   - Become proficient in configuring development environments running
   Django projects
   - Model and implement intricate data structures using relational
   databases such as PostgreSQL
   - Create, implement and edit Django templates with compliant HTML5, CSS3
   and JavaScript
   - Write custom Django apps following client specifications with the
   Caktus team
   - Work on internal Caktus projects and participate in design and code
   reviews
   - Implement responsive and mobile designs for a variety of devices
   - Follow agile development methodologies and take part in weekly team
   scrums and standup meetings
   - Participate in company-wide experimental coding day


*We?d love to meet someone who:*

   - Is excited to work with HTML5 and CSS3
   - Is familiar with Django or other Python web frameworks
   - Actively uses Github or BitBucket to collaborate and share code

To apply: submit your application via our website (
https://www.caktusgroup.com/careers/#op-107028-2016-summer-django-web-development-intern
)

-- 
*Liza Chabot*
Administrative and Marketing Assistant
919-951-0052
-------------- next part --------------
2016 Summer Django Web Development Intern

   Location: Durham, North Carolina, United States
   Full-time

   Caktus builds web and mobile apps with Django. We?ve built over 100 custom
   solutions that have reached more than 70 million people globally. Join our
   sharp team and be part of an open, collaborative culture that puts quality
   at the heart of each project. We?re passionate about solving complex
   challenges especially when they have a social impact. In addition to
   building the world?s first SMS voter registration project in Libya, we?ve
   also built applications for InDemand, Discovery, PBS, Mozilla, and UNICEF.

   Come be a part of a small team of developers and designers passionate
   about creating fun and interactive web applications. Caktus is looking for
   someone who is excited about emerging technologies, creating compelling
   web applications and enjoys writing Python. As a member of the Caktus
   team, you?ll be involved in every aspect of development, from
   brainstorming, to prototyping, to front-end HTML/CSS and Django
   development. You?ll learn and collaborate directly with a great group of
   talented developers and designers.

   ?

   This spring?experience includes:

     *?Position: A 12-week full-time summer internship in Durham, NC
     *?Exposure: Great experience and education in current web development
       techniques and technologies.
     *?Mentorship: At Caktus, you?ll get to work with some of the best and
       brightest minds in the local web development community

   As a Django Web Developer Intern, you will:

     *?Work collaboratively with the development team to learn about the
       Caktus development process
     *?Become familiar with using current distributed version control systems
       (e.g. git and mercurial) effectively in a team environment
     *?Become proficient in configuring development environments running
       Django projects
     *?Model and implement intricate data structures using relational
       databases such as PostgreSQL
     *?Create, implement and edit Django templates with compliant HTML5, CSS3
       and JavaScript
     *?Write custom Django apps following client specifications with the
       Caktus team
     *?Work on internal Caktus projects and participate in design and code
       reviews
     *?Implement responsive and mobile designs for a variety of devices
     *?Follow agile development methodologies and take part in weekly team
       scrums and standup meetings
     *?Participate in company-wide experimental coding day

   We?d love to meet someone who:

     *?Is excited to work with HTML5 and CSS3
     *?Is familiar with Django or other Python web frameworks
     *?Actively uses Github or BitBucket to collaborate and share code

   To apply: submit your application via our website
   ([1]https://www.caktusgroup.com/careers/#op-107028-2016-summer-django-web-development-intern)
   --
   Liza Chabot
   Administrative and Marketing Assistant
   919-951-0052

References

   Visible links
   1. https://www.caktusgroup.com/careers/#op-107028-2016-summer-django-web-development-intern

From cbc at unc.edu  Tue Mar  8 09:44:24 2016
From: cbc at unc.edu (Chris Calloway)
Date: Tue, 8 Mar 2016 09:44:24 -0500
Subject: [TriPython] Reminder: Chapel Hill Project Night
Message-ID: <56DEE548.8060103@unc.edu>

Pizza and Python tomorrow (Wed) night in Chapel Hill:

http://tripython.org/Members/cbc/mar-16-chpn

When: Wednesday, March 9, 6-9pm
Where: Renaissance Computing Institute (RENCI)
        Biltmore Conference Room, 5th Floor, Europa Center
        100 Europa Drive, Suite 590, Chapel Hill

"""
Chapel Hill Project Night meets on second Wednesdays. Have a project you 
want to show off, share, seek help with, or just get some work done 
surrounded by like minded Python lovers? Join us for our monthly project 
night and do just that! Don't have something to work on? Just need some 
help with Python? Show up and enjoy the energy, sprint on an open source 
project, find something interesting to contribute to or be inspired by! 
The setting is informal and there is no schedule, so don't worry if you 
show up past the start time. Whether you are a Python newbie needing 
help or have an open source project you want to share, come hang out and 
hack. Plenty of free after hours parking is available in the RENCI 
parking deck.
"""

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From aikimark at aol.com  Thu Mar 10 08:04:56 2016
From: aikimark at aol.com (Mark Hutchinson)
Date: Thu, 10 Mar 2016 08:04:56 -0500
Subject: [TriPython] Crossword puzzle plagiarism
Message-ID: <15360a13e2e-7a25-2741@webstg-a06.mail.aol.com>

Here is a story about plagiarism in the crossword puzzle world.  Data researchers are plying their skills on all sorts of different data, in this case crossword puzzles.  Seems like there are some bad actors out there.
https://fivethirtyeight.com/features/a-plagiarism-scandal-is-unfolding-in-the-crossword-world/


The reason I'm posting this on the TriPython list server is that the programmer, Saul Pwanson, used Python to do his comparisons.  His project is posted here:
https://github.com/century-arcade/xd


The results are published here:
http://xd.saul.pw/xdiffs/


Mark
-------------- next part --------------
   Here is a story about plagiarism in the crossword puzzle world. ?Data
   researchers are plying their skills on all sorts of different data, in
   this case crossword puzzles. ?Seems like there are some bad actors out
   there.
   https://fivethirtyeight.com/features/a-plagiarism-scandal-is-unfolding-in-the-crossword-world/
   The reason I'm posting this on the TriPython list server is that the
   programmer,?Saul Pwanson,?used Python to do his comparisons. ?His project
   is posted here:
   https://github.com/century-arcade/xd
   The results are published here:
   http://xd.saul.pw/xdiffs/
   Mark

From ginnyghezzo at gmail.com  Wed Mar 16 12:07:37 2016
From: ginnyghezzo at gmail.com (Ginny Ghezzo)
Date: Wed, 16 Mar 2016 12:07:37 -0400
Subject: [TriPython] Join us for DJangoCon Preview on March 20
Message-ID: <CAPocBedg9ruoyfX1vWrOnSZdVv4D6OG75wTxm8bcuxC7v8ourQ@mail.gmail.com>

Hey TriPython,
Please consider joining the local Pyladies on March 20 at 2pm at Caktus
Group in Durham for  preview of Rebecca Conley's DjangoCon Europe
session: From Intern to Professional Developer: Advice on a Mid-Career
Pivot.

Everyone Welcome! It is especially great for anyone thinking about getting
into technology or looking for job transition. You can get more details
either in this eventbrite or through the pyladies meetup.

https://www.eventbrite.com/e/from-intern-to-professional-developer-advice-on-a-mid-career-pivot-tickets-22745614746?aff=es2


and

http://www.meetup.com/pyladies-rdu/events/229577912/

Free and open to the public!

See you there!
Ginny Ghezzo
-------------- next part --------------
   Hey TriPython,?
   Please consider joining the local Pyladies on March 20 at 2pm at Caktus
   Group in Durham for ?preview of Rebecca Conley's DjangoCon Europe
   session:?From Intern to Professional Developer: Advice on a Mid-Career
   Pivot.?
   Everyone Welcome! It is especially great for anyone thinking about getting
   into technology or looking for job transition. You can get more details
   either in this eventbrite or through the pyladies meetup.?

   [1]https://www.eventbrite.com/e/from-intern-to-professional-developer-advice-on-a-mid-career-pivot-tickets-22745614746?aff=es2?
   and ?
   [2]http://www.meetup.com/pyladies-rdu/events/229577912/
   Free and open to the public!?
   See you there!?
   Ginny Ghezzo?

References

   Visible links
   1. https://www.eventbrite.com/e/from-intern-to-professional-developer-advice-on-a-mid-career-pivot-tickets-22745614746?aff=es2
   2. http://www.meetup.com/pyladies-rdu/events/229577912/

From cbc at unc.edu  Fri Mar 18 11:22:35 2016
From: cbc at unc.edu (Chris Calloway)
Date: Fri, 18 Mar 2016 11:22:35 -0400
Subject: [TriPython] Reminder: Durham Project Night (and PyLadies Sunday and
 Graph Database Meeting)
Message-ID: <56EC1D3B.4040101@unc.edu>

We're going to have a very Durham-centric week next week.

On Monday we will be having project night as usual at Caktus Group in 
Durham. Mark Hutchinson, I plan to be there so we can get you working on 
the recommendations content of tripython.org.

There is also a PyLadies meeting early on Sunday afternoon to which we 
are graciously invited. The subject matter is of interest to many of you 
looking for jobs and/or career change (I'm looking at you IronYard 
students and alums). Rebecca Conley is speaking. Let's show support for 
PyLadies.

Finally, I'll send out another reminder next week, but don't forget 
James Whisnant's much anticipated Neo4J with Python talk this coming 
Thursday at Bull City Co-working. James got in some practice with this 
talk at Analytics Forward (a *fantastic* unconference by the way 
attended by many TriPythonites), so I think we're going to see and hear 
a very polished presentation.

URL: http://tripython.org/Members/markdlavin/mar-16-dpn
What: Durham Project Night
When: Monday, March 21, 6-9pm
Where: Caktus Group, 108 Morris St., Durham

"""
Durham Project Night meets on third Mondays. Have a project you want to 
show off, share, seek help with, or just get some work done surrounded 
by like minded Python lovers? Join us for our monthly project night and 
do just that! Don't have something to work on? Just need some help with 
Python? Show up and enjoy the energy, sprint on an open source project, 
find something interesting to contribute to or be inspired by! The 
setting is informal and there is no schedule, so don't worry if you show 
up past the start time. Whether you are a Python newbie needing help or 
have an open source project you want to share, come hang out and hack. 
Park in the municipal deck on the other side of the Arts Council across 
W. Morgan St. The entrance to the Caktus Tech Space is on Morris St.
"""

URL: http://www.meetup.com/pyladies-rdu/events/229577912/
What: PyLadies DjangoCon Europe Preview by Rebecca Conley
When: Sunday, March 20, 2-3pm
Where: Caktus Group, 108 Morris St., Durham

"""
Not everyone who becomes a developer started out their career that way. 
Encouraging people to transition into web development from other fields 
benefits both those individuals and the Django community as a whole by 
increasing visible diversity and diversity of perspective. If you are 
considering such a transition, what steps can you take to achieve your 
goals? What insight and experience do people making a mid-career 
transition into coding have to offer us as a community? Why should we 
encourage those transitions? What is the Django community already doing 
to support those transitions, and what more can we do?
"""

URL: http://tripython.org/Members/rpetrusz/mar-16-mtg
What: Chasing Cats around the London Underground Using Python and Neo4j
When: Thursday, March 24, 7-9pm (with after-party)
Where: Bull City Coworking, 112 S. Duke St., Suite 6, Durham

"""
Chasing cats is difficult. Public transportation is confusing. We will 
look at a simulation of a number of people trying to find their lost pet 
cat on the Tube. James Whisnant, a developer with the Carolina 
Population Center, will introduce graph databases and Neo4j in 
particular. He will introduce us to Cypher, the Neo4j query language and 
use py2neo, a python Neo4j binding, to modify a Neo4j database. You will 
visualize Neo4j database graphs in a web browser during the simulation 
while looking at Python code. Extemporaneous "lightning talks" of 5-10 
minute duration are also welcome and don't need to be pre-announced. 
Lightning talks are for you to "show and tell" something you've learned 
about Python recently, no matter how small. We all use Python, 
therefore, we are always learning something new about Python that we can 
tell others. Please see the parking instructions on the BCC website. We 
will walk en masse around the corner to Satisfactions for a lively 
after-meeting.
"""

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From leslie.sox at gmail.com  Sat Mar 19 18:26:15 2016
From: leslie.sox at gmail.com (Leslie Sox)
Date: Sat, 19 Mar 2016 18:26:15 -0400
Subject: [TriPython] Python Distribution | Intel(R) | O'Reilly Developer Zone
Message-ID: <CAHK1xyiOjGq2Eg_+o5ZQePepzvH10MVJdB3J_3ohsy9PQjLhTA@mail.gmail.com>

As seen today on an O'Reilly Programming Newsletter

Intel introduces a Python distribution

https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319

Leslie John Sox

Sent from my Nexus 6
-------------- next part --------------
   As seen today on an O'Reilly Programming Newsletter

   Intel introduces a Python distribution

   [1]https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319

   Leslie John Sox

   Sent from my Nexus 6

References

   Visible links
   1. https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319

From willspearman at gmail.com  Sat Mar 19 19:13:21 2016
From: willspearman at gmail.com (Will Spearman)
Date: Sat, 19 Mar 2016 23:13:21 +0000
Subject: [TriPython] Python Distribution | Intel(R) | O'Reilly Developer
 Zone
In-Reply-To: <CAHK1xyiOjGq2Eg_+o5ZQePepzvH10MVJdB3J_3ohsy9PQjLhTA@mail.gmail.com>
References: <CAHK1xyiOjGq2Eg_+o5ZQePepzvH10MVJdB3J_3ohsy9PQjLhTA@mail.gmail.com>
Message-ID: <CAPbmUL40FrB0wbGmLMOTpLOLd6uWWuX_L=vyc=A6+6o06a599w@mail.gmail.com>

Thanks for sharing!
On Sat, Mar 19, 2016 at 6:26 PM Leslie Sox <leslie.sox at gmail.com> wrote:

>    As seen today on an O'Reilly Programming Newsletter
>
>    Intel introduces a Python distribution
>
>    [1]
> https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319
>
>    Leslie John Sox
>
>    Sent from my Nexus 6
>
> References
>
>    Visible links
>    1.
> https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
-------------- next part --------------
   Thanks for sharing!
   On Sat, Mar 19, 2016 at 6:26 PM Leslie Sox <[1]leslie.sox at gmail.com>
   wrote:

     ? ?As seen today on an O'Reilly Programming Newsletter

     ? ?Intel introduces a Python distribution

     ?
     ?[1][2]https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319

     ? ?Leslie John Sox

     ? ?Sent from my Nexus 6

     References

     ? ?Visible links
     ? ?1.
     [3]https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319
     _______________________________________________
     TriZPUG mailing list
     [4]TriZPUG at python.org
     [5]https://mail.python.org/mailman/listinfo/trizpug
     [6]http://tripython.org is the Triangle Python Users Group

References

   Visible links
   1. mailto:leslie.sox at gmail.com
   2. https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319
   3. https://software.intel.com/en-us/python-distribution?imm_mid=0e1cf3&cmp=em-prog-na-na-newsltr_20160319
   4. mailto:TriZPUG at python.org
   5. https://mail.python.org/mailman/listinfo/trizpug
   6. http://tripython.org/

From rex.dwyer at att.net  Sun Mar 20 13:04:22 2016
From: rex.dwyer at att.net (Rex Dwyer)
Date: Sun, 20 Mar 2016 13:04:22 -0400
Subject: [TriPython] New regex module
Message-ID: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>

Is anybody interested in a talk on the amazing things you can do with the new regex module?
Rex


From trawick at gmail.com  Mon Mar 21 11:58:00 2016
From: trawick at gmail.com (Jeff Trawick)
Date: Mon, 21 Mar 2016 11:58:00 -0400
Subject: [TriPython] New regex module
In-Reply-To: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
Message-ID: <CAKUrXK7wB0bc_8LePvGfcBgGCE_e-o+y9eK=4u7vppOAd8pVTQ@mail.gmail.com>

On Sun, Mar 20, 2016 at 1:04 PM, Rex Dwyer <rex.dwyer at att.net> wrote:

> Is anybody interested in a talk on the amazing things you can do with the
> new regex module?
> Rex
>

+1
-------------- next part --------------
   On Sun, Mar 20, 2016 at 1:04 PM, Rex Dwyer <[1]rex.dwyer at att.net> wrote:

     Is anybody interested in a talk on the amazing things you can do with
     the new regex module?
     Rex

   +1
   ?

References

   Visible links
   1. mailto:rex.dwyer at att.net

From devin at nacredata.com  Mon Mar 21 12:01:04 2016
From: devin at nacredata.com (Devin Ceartas)
Date: Mon, 21 Mar 2016 12:01:04 -0400
Subject: [TriPython] New regex module
In-Reply-To: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
Message-ID: <FC19EBAD-8FBD-4779-976D-5DF87B63DFD6@nacredata.com>

sure, love regex. Didn't know there was something new in that space.


On 20 Mar 2016, at 13:04, Rex Dwyer wrote:

> Is anybody interested in a talk on the amazing things you can do with 
> the new regex module?
> Rex
>
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group



devin
--
contact info: https://nacredata.com/devin

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https://secure.voteclimatepac.org/donate/
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https://www.buckeyeforestcouncil.org/donate.php

From cbc at unc.edu  Mon Mar 21 12:27:14 2016
From: cbc at unc.edu (Chris Calloway)
Date: Mon, 21 Mar 2016 12:27:14 -0400
Subject: [TriPython] New regex module
In-Reply-To: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
Message-ID: <56F020E2.9000800@unc.edu>

On 3/20/16 1:04 PM, Rex Dwyer wrote:
> Is anybody interested in a talk on the amazing things you can do with the new regex module?

I'm very interested.

But this is Python. We don't ask for permission (or interest). You 
declare the talk you are making is happening and then deal with any 
exceptions that get raised. :)

Java:

if (EmailList.isThisOKWithYou()) {
         Meeting.oKIllDoIt();
     }
     } else {
         UserGroup.PanicAndAbort();
     }

Python:

try:
     hey_im_doing_a_talk(new_regex)
except:
     fuhgeddaboudit()

Seriously, this is the group of people interested in sharing what they 
know about Python with each other. Have something to share? Have a month 
in mind?

You name your talk and what month you want to give it and it will be put 
on the calendar and announcements sent. Thanks!

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From berserker at gmail.com  Mon Mar 21 12:46:31 2016
From: berserker at gmail.com (Tristan)
Date: Mon, 21 Mar 2016 12:46:31 -0400
Subject: [TriPython] New regex module
In-Reply-To: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
Message-ID: <CADNHAEQ-7mZWiz60wofGHu+EDRWna6deOKCwVyR=sEmD8=-svA@mail.gmail.com>

I would.  I've used a bit of the new fuzzy matching (good for some quick
and dirty genomics pre-analysis), but I feel I'm taking poor advantage of
it.


Tristan

On Sun, Mar 20, 2016 at 1:04 PM, Rex Dwyer <rex.dwyer at att.net> wrote:

> Is anybody interested in a talk on the amazing things you can do with the
> new regex module?
> Rex
>
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
>
-------------- next part --------------
   I would.? I've used a bit of the new fuzzy matching (good for some quick
   and dirty genomics pre-analysis), but I feel I'm taking poor advantage of
   it.
   Tristan
   On Sun, Mar 20, 2016 at 1:04 PM, Rex Dwyer <[1]rex.dwyer at att.net> wrote:

     Is anybody interested in a talk on the amazing things you can do with
     the new regex module?
     Rex

     _______________________________________________
     TriZPUG mailing list
     [2]TriZPUG at python.org
     [3]https://mail.python.org/mailman/listinfo/trizpug
     [4]http://tripython.org is the Triangle Python Users Group

References

   Visible links
   1. mailto:rex.dwyer at att.net
   2. mailto:TriZPUG at python.org
   3. https://mail.python.org/mailman/listinfo/trizpug
   4. http://tripython.org/

From aikimark at aol.com  Mon Mar 21 13:05:33 2016
From: aikimark at aol.com (mark hutchinson)
Date: Mon, 21 Mar 2016 17:05:33 +0000 (UTC)
Subject: [TriPython] New regex module
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
Message-ID: <loom.20160321T180309-484@post.gmane.org>

Rex Dwyer <rex.dwyer at ...> writes:

> 
> Is anybody interested in a talk on the amazing things you can do with the 
new regex module?
> Rex
> 
> 

Is this different than the regex module/library/pkg?

I'm always interested in a regular expression presentation.

Mark



From jmack at austintek.com  Mon Mar 21 13:39:32 2016
From: jmack at austintek.com (Joseph Mack NA3T)
Date: Mon, 21 Mar 2016 17:39:32 +0000 (GMT)
Subject: [TriPython] making a color wheel
Message-ID: <alpine.DEB.2.10.1603211738500.27192@www.wm7d.net>

For a classrom demonstration, I would like to repeat Maxwell's spinning color 
wheel demonstration of combining r,g,b to appear white. I could go out and get 
a motor and colored paper, but then I thought I should be able to paint a color 
wheel on a screen and do the same thing. At the frame rate of modern displays 
this should work. My first attempt (below), filling a box with r,g and then b, 
doesn't produce white. Instead I get lots of flashing r,g and b rectangles.

I assume the code is not update()'ing the screen synchronously with every 
frame. Whether it's faster or slower I have no idea. I don't know if screens 
are being buffered and then not written when the next colored rectangle is 
presented.

Any suggestions?

Thanks Joe

----

#!/usr/bin/python

# from drawCircleArcExample.py     P. Conrad for CS5nm, 10/31/2008
#  How to draw an arc in Pygame that is part of a circle
# http://www.cs.ucsb.edu/~pconrad/cs5nm/08F/ex/ex09/drawCircleArcExample.py

import pygame
from pygame.locals import *
from sys import exit

pygame.init()
screen = pygame.display.set_mode((160,120))

white = (255,255,255);
red = (255,0,0);
green = (0,255,0);
blue = (0,0,255);

while True:

     for event in pygame.event.get():
         if event.type == QUIT:
             pygame.quit(); sys.exit();

     screen.fill(red);
     pygame.display.update()
     screen.fill(green);
     pygame.display.update()
     screen.fill(blue);
     pygame.display.update()

#-----

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) austintek (dot) com - azimuthal equidistant
map generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

From rex.dwyer at att.net  Mon Mar 21 15:09:43 2016
From: rex.dwyer at att.net (Rex Dwyer)
Date: Mon, 21 Mar 2016 15:09:43 -0400
Subject: [TriPython] New regex module
In-Reply-To: <loom.20160321T180309-484@post.gmane.org>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
 <loom.20160321T180309-484@post.gmane.org>
Message-ID: <56F046F7.3050509@att.net>

It's regex, the future replacement for re.
- Rex

On 3/21/2016 1:05 PM, mark hutchinson via TriZPUG wrote:
> Rex Dwyer <rex.dwyer at ...> writes:
>
>> Is anybody interested in a talk on the amazing things you can do with the
> new regex module?
>> Rex
>>
>>
> Is this different than the regex module/library/pkg?
>
> I'm always interested in a regular expression presentation.
>
> Mark
>
>
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
>


From cbc at unc.edu  Mon Mar 21 16:21:48 2016
From: cbc at unc.edu (Chris Calloway)
Date: Mon, 21 Mar 2016 16:21:48 -0400
Subject: [TriPython] New regex module
In-Reply-To: <56F046F7.3050509@att.net>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
 <loom.20160321T180309-484@post.gmane.org> <56F046F7.3050509@att.net>
Message-ID: <56F057DC.9070507@unc.edu>

On 3/21/16 3:09 PM, Rex Dwyer wrote:
> It's regex, the future replacement for re.

I think he's wondering if it's the same regex he's been using out of 
Pypi that he mentioned about in a lightning talk recently:

https://pypi.python.org/pypi/regex

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From rex.dwyer at att.net  Mon Mar 21 16:25:22 2016
From: rex.dwyer at att.net (Rex Dwyer)
Date: Mon, 21 Mar 2016 16:25:22 -0400
Subject: [TriPython] New regex module
In-Reply-To: <56F057DC.9070507@unc.edu>
References: <311CF3A2-AB34-4C3E-ACB4-14B90B046FA1@att.net>
 <loom.20160321T180309-484@post.gmane.org> <56F046F7.3050509@att.net>
 <56F057DC.9070507@unc.edu>
Message-ID: <56F058B2.5010601@att.net>

That's the one.  I guess I missed that talk.

On 3/21/2016 4:21 PM, Chris Calloway wrote:
> On 3/21/16 3:09 PM, Rex Dwyer wrote:
>> It's regex, the future replacement for re.
>
> I think he's wondering if it's the same regex he's been using out of 
> Pypi that he mentioned about in a lightning talk recently:
>
> https://pypi.python.org/pypi/regex
>


From jmack at austintek.com  Mon Mar 21 17:39:08 2016
From: jmack at austintek.com (Joseph Mack NA3T)
Date: Mon, 21 Mar 2016 21:39:08 +0000 (GMT)
Subject: [TriPython] making a color wheel
In-Reply-To: <alpine.DEB.2.10.1603211738500.27192@www.wm7d.net>
References: <alpine.DEB.2.10.1603211738500.27192@www.wm7d.net>
Message-ID: <alpine.DEB.2.10.1603212120070.10849@www.wm7d.net>

On Mon, 21 Mar 2016, Joseph Mack NA3T wrote:

Thinking that speed was the problem and that python being interpreted, would be 
slow, I tried it with Xlib and got similar results (interleaved colored lines). 
Even standing on the other side of the room, the lines were thick enough to be 
resolved individually.

One thing I hadn't realised was that if I try to make white out of mixing r,g 
and b, ie

1/3((255,0,0)+(0,255,0)+(0,0,255))

I'm going to get a dark grey (85,85,85) rather than white (255,255,255). This is 
not going to be a terribly impressive demonstration, even if I do get the colors 
to blend.

This problem isn't particular to a computer display. The same thing happens with 
the mechanical color wheel except that you do it in a darkened room with a 
bright light on the spinning wheel. Then the spinning wheel appears white.

Presumably something else I could try is to view a loop of jpegs, one red, one 
green, one blue in vlc.

Joe


> For a classrom demonstration, I would like to repeat Maxwell's spinning color 
> wheel demonstration of combining r,g,b to appear white. I could go out and 
> get a motor and colored paper, but then I thought I should be able to paint a 
> color wheel on a screen and do the same thing. At the frame rate of modern 
> displays this should work. My first attempt (below), filling a box with r,g 
> and then b, doesn't produce white. Instead I get lots of flashing r,g and b 
> rectangles.
>
> I assume the code is not update()'ing the screen synchronously with every 
> frame. Whether it's faster or slower I have no idea. I don't know if screens 
> are being buffered and then not written when the next colored rectangle is 
> presented.
>
> Any suggestions?
>
> Thanks Joe
>
> ----
>
> #!/usr/bin/python
>
> # from drawCircleArcExample.py     P. Conrad for CS5nm, 10/31/2008
> #  How to draw an arc in Pygame that is part of a circle
> # http://www.cs.ucsb.edu/~pconrad/cs5nm/08F/ex/ex09/drawCircleArcExample.py
>
> import pygame
> from pygame.locals import *
> from sys import exit
>
> pygame.init()
> screen = pygame.display.set_mode((160,120))
>
> white = (255,255,255);
> red = (255,0,0);
> green = (0,255,0);
> blue = (0,0,255);
>
> while True:
>
>    for event in pygame.event.get():
>        if event.type == QUIT:
>            pygame.quit(); sys.exit();
>
>    screen.fill(red);
>    pygame.display.update()
>    screen.fill(green);
>    pygame.display.update()
>    screen.fill(blue);
>    pygame.display.update()
>
> #-----
>
>

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) austintek (dot) com - azimuthal equidistant
map generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

From cbc at unc.edu  Mon Mar 21 18:18:47 2016
From: cbc at unc.edu (Chris Calloway)
Date: Mon, 21 Mar 2016 18:18:47 -0400
Subject: [TriPython] making a color wheel
In-Reply-To: <alpine.DEB.2.10.1603212120070.10849@www.wm7d.net>
References: <alpine.DEB.2.10.1603211738500.27192@www.wm7d.net>
 <alpine.DEB.2.10.1603212120070.10849@www.wm7d.net>
Message-ID: <56F07347.60105@unc.edu>

On 3/21/16 5:39 PM, Joseph Mack NA3T wrote:
> Presumably something else I could try is to view a loop of jpegs, one
> red, one green, one blue

This is certainly the best way. Pre-computing and assembling the images 
into a video file with Python makes sense. Looping images one frame at a 
time would be as fast as you could get on a screen. I don't think it 
will produce white without artifacts. There is a ratio of RGB that does 
produce white for any given screen and for the *eye*. But it's not an 
even distribution of RGB.

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From jmack at austintek.com  Mon Mar 21 20:01:04 2016
From: jmack at austintek.com (Joseph Mack NA3T)
Date: Tue, 22 Mar 2016 00:01:04 +0000 (GMT)
Subject: [TriPython] making a color wheel
In-Reply-To: <56F07347.60105@unc.edu>
References: <alpine.DEB.2.10.1603211738500.27192@www.wm7d.net>
 <alpine.DEB.2.10.1603212120070.10849@www.wm7d.net> <56F07347.60105@unc.edu>
Message-ID: <alpine.DEB.2.10.1603212252470.14167@www.wm7d.net>

On Mon, 21 Mar 2016, Chris Calloway wrote:

> On 3/21/16 5:39 PM, Joseph Mack NA3T wrote:
>> Presumably something else I could try is to view a loop of jpegs, one
>> red, one green, one blue
>
> This is certainly the best way.

glad of confirmation that I might be on the right track.

After just pumping colored boxes at the display with python and libX, I realise 
that I have no control over the rate at which the boxes are displayed and what 
connection if any there is to the frame rate.

If I generate a video, then at least someone else is in charge of delivering 
frames at a set rate to the display, although how they do that I don't know.

> Pre-computing and assembling the images into a video file with Python makes 
> sense. Looping images one frame at a time would be as fast as you could get on 
> a screen.

OK

> I don't think it will produce white without artifacts. There is a ratio of RGB 
> that does produce white for any given screen and for the *eye*. But it's not 
> an even distribution of RGB.

I will find out shortly. About 5% of white light is blue (whether this is 
measured in photons or energy I don't know). Presumably I won't have to worry 
about this as (255,255,255) is white. This would indicate that the white 
balance, at least on a display, is equal r,g and b.

Thanks Joe

>
>

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) austintek (dot) com - azimuthal equidistant
map generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

From jtim.arnold at gmail.com  Mon Mar 21 20:11:46 2016
From: jtim.arnold at gmail.com (Tim Arnold)
Date: Mon, 21 Mar 2016 20:11:46 -0400
Subject: [TriPython] making a color wheel
In-Reply-To: <alpine.DEB.2.10.1603212252470.14167@www.wm7d.net>
References: <alpine.DEB.2.10.1603211738500.27192@www.wm7d.net>
 <alpine.DEB.2.10.1603212120070.10849@www.wm7d.net>
 <56F07347.60105@unc.edu>
 <alpine.DEB.2.10.1603212252470.14167@www.wm7d.net>
Message-ID: <CA+O6OTA6ABDVAbGnehAbNYyorQ956MdvdTaq0FSJPuJFWwP_LQ@mail.gmail.com>

I could be totally off-track here, but I thought the color wheel illusion
was about reflected light, not transmitted light.

The difference being additive vs subtractive color scheme.

--Tim


On Mon, Mar 21, 2016 at 8:01 PM, Joseph Mack NA3T <jmack at austintek.com>
wrote:

> On Mon, 21 Mar 2016, Chris Calloway wrote:
>
> On 3/21/16 5:39 PM, Joseph Mack NA3T wrote:
>>
>>> Presumably something else I could try is to view a loop of jpegs, one
>>> red, one green, one blue
>>>
>>
>> This is certainly the best way.
>>
>
> glad of confirmation that I might be on the right track.
>
> After just pumping colored boxes at the display with python and libX, I
> realise that I have no control over the rate at which the boxes are
> displayed and what connection if any there is to the frame rate.
>
> If I generate a video, then at least someone else is in charge of
> delivering frames at a set rate to the display, although how they do that I
> don't know.
>
> Pre-computing and assembling the images into a video file with Python
>> makes sense. Looping images one frame at a time would be as fast as you
>> could get on a screen.
>>
>
> OK
>
> I don't think it will produce white without artifacts. There is a ratio of
>> RGB that does produce white for any given screen and for the *eye*. But
>> it's not an even distribution of RGB.
>>
>
> I will find out shortly. About 5% of white light is blue (whether this is
> measured in photons or energy I don't know). Presumably I won't have to
> worry about this as (255,255,255) is white. This would indicate that the
> white balance, at least on a display, is equal r,g and b.
>
> Thanks Joe
>
>
>>
>>
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> jmack (at) austintek (dot) com - azimuthal equidistant
> map generator at http://www.wm7d.net/azproj.shtml
> Homepage http://www.austintek.com/ It's GNU/Linux!
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
>
-------------- next part --------------
   I could be totally off-track here, but I thought the color wheel illusion
   was about reflected light, not transmitted light.
   The difference being additive vs subtractive color scheme.?
   --Tim
   On Mon, Mar 21, 2016 at 8:01 PM, Joseph Mack NA3T <[1]jmack at austintek.com>
   wrote:

     On Mon, 21 Mar 2016, Chris Calloway wrote:

       On 3/21/16 5:39 PM, Joseph Mack NA3T wrote:

         Presumably something else I could try is to view a loop of jpegs,
         one
         red, one green, one blue

       This is certainly the best way.

     glad of confirmation that I might be on the right track.

     After just pumping colored boxes at the display with python and libX, I
     realise that I have no control over the rate at which the boxes are
     displayed and what connection if any there is to the frame rate.

     If I generate a video, then at least someone else is in charge of
     delivering frames at a set rate to the display, although how they do
     that I don't know.

       Pre-computing and assembling the images into a video file with Python
       makes sense. Looping images one frame at a time would be as fast as
       you could get on a screen.

     OK

       I don't think it will produce white without artifacts. There is a
       ratio of RGB that does produce white for any given screen and for the
       *eye*. But it's not an even distribution of RGB.

     I will find out shortly. About 5% of white light is blue (whether this
     is measured in photons or energy I don't know). Presumably I won't have
     to worry about this as (255,255,255) is white. This would indicate that
     the white balance, at least on a display, is equal r,g and b.

     Thanks Joe

     --
     Joseph Mack NA3T EME(B,D), FM05lw North Carolina
     jmack (at) austintek (dot) com - azimuthal equidistant
     map generator at [2]http://www.wm7d.net/azproj.shtml
     Homepage [3]http://www.austintek.com/ It's GNU/Linux!
     _______________________________________________
     TriZPUG mailing list
     [4]TriZPUG at python.org
     [5]https://mail.python.org/mailman/listinfo/trizpug
     [6]http://tripython.org is the Triangle Python Users Group

References

   Visible links
   1. mailto:jmack at austintek.com
   2. http://www.wm7d.net/azproj.shtml
   3. http://www.austintek.com/
   4. mailto:TriZPUG at python.org
   5. https://mail.python.org/mailman/listinfo/trizpug
   6. http://tripython.org/

From jmack at austintek.com  Mon Mar 21 21:16:27 2016
From: jmack at austintek.com (Joseph Mack NA3T)
Date: Tue, 22 Mar 2016 01:16:27 +0000 (GMT)
Subject: [TriPython] making a color wheel
Message-ID: <alpine.DEB.2.10.1603220115540.26735@www.wm7d.net>

On Mon, 21 Mar 2016, Tim Arnold wrote:

> I could be totally off-track here, but I thought the color wheel illusion
> was about reflected light, not transmitted light.
> 
> The difference being additive vs subtractive color scheme.

red is red whether it comes from a light or from white light reflected off a 
red pigment.

the addition and subtraction come from mixing two colors.

with lights (eg a display) you add colors. So if you have a red light and a 
green light, you'll see yellow

with pigments (eg a printer) you subtract colors, so if you have a yellow 
pigment and a cyan pigment in the same spot on the paper, you'll get green.

With Maxwell's color wheel, there are three separate segments, r,g,b, producing 
separate streams of light (by reflection) which the eye adds to produce white.

If instead you mixed the the pignents in the three segments, to make one 
segment, you would have a black segment

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) austintek (dot) com - azimuthal equidistant
map generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

From rayi at renci.org  Tue Mar 22 07:36:18 2016
From: rayi at renci.org (Ray Idaszak)
Date: Tue, 22 Mar 2016 11:36:18 +0000
Subject: [TriPython] making a color wheel
In-Reply-To: <alpine.DEB.2.10.1603220115540.26735@www.wm7d.net>
References: <alpine.DEB.2.10.1603220115540.26735@www.wm7d.net>
Message-ID: <30cd0a7776b142f08cedd0d4cd67b134@exchange-2.ad.renci.org>

> illusion was about reflected light, not transmitted light.

Modern Digital Light Processing (DLP) projectors use a single color wheel based on transmissive/additive light properties:

https://en.wikipedia.org/wiki/Digital_Light_Processing

One can even buy replacement color wheels for these on Amazon or eBay.



-----Original Message-----
From: TriZPUG [mailto:trizpug-bounces+rayi=renci.org at python.org] On Behalf Of Joseph Mack NA3T
Sent: Monday, March 21, 2016 9:16 PM
To: Triangle Python Users Group <trizpug at python.org>
Subject: Re: [TriPython] making a color wheel

On Mon, 21 Mar 2016, Tim Arnold wrote:

> I could be totally off-track here, but I thought the color wheel 
> illusion was about reflected light, not transmitted light.
> 
> The difference being additive vs subtractive color scheme.

red is red whether it comes from a light or from white light reflected off a red pigment.

the addition and subtraction come from mixing two colors.

with lights (eg a display) you add colors. So if you have a red light and a green light, you'll see yellow

with pigments (eg a printer) you subtract colors, so if you have a yellow pigment and a cyan pigment in the same spot on the paper, you'll get green.

With Maxwell's color wheel, there are three separate segments, r,g,b, producing separate streams of light (by reflection) which the eye adds to produce white.

If instead you mixed the the pignents in the three segments, to make one segment, you would have a black segment

Joe

--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina jmack (at) austintek (dot) com - azimuthal equidistant map generator at http://www.wm7d.net/azproj.shtml Homepage http://www.austintek.com/ It's GNU/Linux!
_______________________________________________
TriZPUG mailing list
TriZPUG at python.org
https://mail.python.org/mailman/listinfo/trizpug
http://tripython.org is the Triangle Python Users Group

From jmack at austintek.com  Tue Mar 22 08:53:47 2016
From: jmack at austintek.com (Joseph Mack NA3T)
Date: Tue, 22 Mar 2016 12:53:47 +0000 (GMT)
Subject: [TriPython] making a color wheel
In-Reply-To: <30cd0a7776b142f08cedd0d4cd67b134@exchange-2.ad.renci.org>
References: <alpine.DEB.2.10.1603220115540.26735@www.wm7d.net>
 <30cd0a7776b142f08cedd0d4cd67b134@exchange-2.ad.renci.org>
Message-ID: <alpine.DEB.2.10.1603221249100.30502@www.wm7d.net>

On Tue, 22 Mar 2016, Ray Idaszak wrote:

>> illusion was about reflected light, not transmitted light.
>
> Modern Digital Light Processing (DLP) projectors use a single color wheel based on transmissive/additive light properties:
>
> https://en.wikipedia.org/wiki/Digital_Light_Processing
>
> One can even buy replacement color wheels for these on Amazon or eBay.

thanks.

I had assumed all projectors had three streams of light hitting 3 lots of 
mirrors. At least that way, you'd get three times the amount of light out.

I was planning on using a projector for my demonstration. I'll now be able to 
say that the projector internally has a color wheel.

What I find hard to believe is that you can have mechanical mirrors moving fast 
enough to turn the pixels on and off.

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) austintek (dot) com - azimuthal equidistant
map generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

From cbc at unc.edu  Wed Mar 23 11:57:53 2016
From: cbc at unc.edu (Chris Calloway)
Date: Wed, 23 Mar 2016 11:57:53 -0400
Subject: [TriPython] Reminder: TriPython March 2016 Meeting: Chasing Cats
 around the London Underground Using Python and Neo4j
Message-ID: <56F2BD01.1090704@unc.edu>

Big meeting (big as in almost 60 RSVPs between us and the graph database 
meeting) tomorrow at Bull City Coworking.

The after meeting might present a problem tomorrow. Duke is playing at 
the very time we normally go to Satisfactions. Satisfactions is the 
place where Duke fans go to watch games. Plus all the other places 
around Satisfactions will be similarly jammed. Suggestions welcome.

http://tripython.org/Members/rpetrusz/mar-16-mtg/

When: Thursday, March 24, 7-9pm
Where: Bull City Coworking
        112 S. Duke St., Suite 6
        Durham
What:

"""
Chasing cats is difficult. Public transportation is confusing. We will 
look at a simulation of a number of people trying to find their lost pet 
cat on the Tube. James Whisnant, a developer with the Carolina 
Population Center, will introduce graph databases and Neo4j in 
particular. He will introduce us to Cypher, the Neo4j query language and 
use py2neo, a python Neo4j binding, to modify a Neo4j database. You will 
visualize Neo4j database graphs in a web browser during the simulation 
while looking at Python code. Extemporaneous "lightning talks" of 5-10 
minute duration are also welcome and don't need to be pre-announced. 
Lightning talks are for you to "show and tell" something you've learned 
about Python recently, no matter how small. We all use Python, 
therefore, we are always learning something new about Python that we can 
tell others. Please see the parking instructions on the BCC website. We 
will adjourn to an after-meeting at a nearby public house.
"""

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From aikimark at aol.com  Thu Mar 24 14:30:02 2016
From: aikimark at aol.com (Mark Hutchinson)
Date: Thu, 24 Mar 2016 14:30:02 -0400
Subject: [TriPython] Python Regex Golf
Message-ID: <153a9e3f40b-7f96-e60d@webstg-m05.mail.aol.com>

This is a sophisticated presentation with Peter Norvig narrating his solution to finding a minimum covering set of regular expression patterns that solve the presidential winners/losers sets mentioned in xkcd comic #1313.
https://www.oreilly.com/learning/regex-golf-with-peter-norvig


Peter's video presentation is synced up with the iPython notebook, which I'd never seen before.  It is a pretty slick presentation.  You might need to sign into the O'Reilly site with your (FB, LinkedIn, Twitter, etc.) credentials.  The presentation is free.


My lightning talk last month was on a minimum covering set problem.


Mark
-------------- next part --------------
   This is a sophisticated presentation with Peter Norvig narrating his
   solution to finding a minimum covering set of regular expression patterns
   that solve the presidential winners/losers sets mentioned in xkcd comic
   #1313.
   https://www.oreilly.com/learning/regex-golf-with-peter-norvig
   Peter's video presentation is synced up with the iPython notebook, which
   I'd never seen before.  It is a pretty slick presentation.  You might need
   to sign into the O'Reilly site with your (FB, LinkedIn, Twitter, etc.)
   credentials.  The presentation is free.
   My lightning talk last month was on a minimum covering set problem.
   Mark

From aikimark at aol.com  Thu Mar 24 14:44:50 2016
From: aikimark at aol.com (Mark Hutchinson)
Date: Thu, 24 Mar 2016 14:44:50 -0400
Subject: [TriPython] New UX
Message-ID: <153a9f18004-75ac-d1f3@webstg-m07.mail.aol.com>

The Peter Norvig presentation was an example of a new presentation tool, named Oriole.
https://www.oreilly.com/ideas/oreilly-oriole-learn-alongside-innovators-thought-by-thought-in-context


Mark
-------------- next part --------------
   The Peter Norvig presentation was an example of a new presentation tool,
   named Oriole.
   https://www.oreilly.com/ideas/oreilly-oriole-learn-alongside-innovators-thought-by-thought-in-context
   Mark

From jim at ibang.com  Thu Mar 24 15:27:48 2016
From: jim at ibang.com (Jim Allman)
Date: Thu, 24 Mar 2016 15:27:48 -0400
Subject: [TriPython] New UX
In-Reply-To: <153a9f18004-75ac-d1f3@webstg-m07.mail.aol.com>
References: <153a9f18004-75ac-d1f3@webstg-m07.mail.aol.com>
Message-ID: <D4F71154-9232-45A3-9C04-C6D446EC13E2@ibang.com>

On Mar 24, 2016, at 2:44 PM, Mark Hutchinson via TriZPUG <trizpug at python.org> wrote:
> 
>   The Peter Norvig presentation was an example of a new presentation tool,
>   named Oriole.
>   https://www.oreilly.com/ideas/oreilly-oriole-learn-alongside-innovators-thought-by-thought-in-context

This page in turn links to the open-source Thebe (which allows running a Jupyter browser UI outside of the normal notebook context). Neat stuff!

https://github.com/oreillymedia/thebe

  =jimA=

Jim Allman
Interrobang Digital Media
http://www.ibang.com/
(919) 649-5760


From aikimark at aol.com  Fri Mar 25 10:33:18 2016
From: aikimark at aol.com (Mark Hutchinson)
Date: Fri, 25 Mar 2016 10:33:18 -0400
Subject: [TriPython] James' slides?
Message-ID: <153ae3194c0-6a91-f7d8@webstg-a04.mail.aol.com>

Are the slides for last night's presentation available somewhere?  One of the GraphDB meetup folks just asked about them.


Mark
-------------- next part --------------
   Are the slides for last night's presentation available somewhere? ?One of
   the GraphDB meetup folks just asked about them.
   Mark

From jwhisnant at gmail.com  Sat Mar 26 16:17:02 2016
From: jwhisnant at gmail.com (James Whisnant)
Date: Sat, 26 Mar 2016 16:17:02 -0400
Subject: [TriPython] James' slides?
In-Reply-To: <153ae3194c0-6a91-f7d8@webstg-a04.mail.aol.com>
References: <153ae3194c0-6a91-f7d8@webstg-a04.mail.aol.com>
Message-ID: <CABGiAJHZH4Z61-T5k3onDOoT4TYrVC-EJ2bsaGEJuXb39QawjQ@mail.gmail.com>

Below are links to the my slides and code.

Slides: http://slides.com/jameswhisnant/cats
Code: https://bitbucket.org/jwhisnant/cats

Some other resources that may be of interest:

Using Python and Neo4j for Data Analytics
https://www.youtube.com/watch?v=Nkd6Ei-xuxI

Cycli, a helpful neo4j-shell client
https://github.com/nicolewhite/cycli

How to build a Python web application with Flask and Neo4j - PyCon SE 2015
https://www.youtube.com/watch?v=ZMOHEh-caTc

Code from the video above.
https://github.com/nicolewhite/neo4j-flask

Enjoy,
James

On Fri, Mar 25, 2016 at 10:33 AM, Mark Hutchinson via TriZPUG <
trizpug at python.org> wrote:

>    Are the slides for last night's presentation available somewhere?  One
> of
>    the GraphDB meetup folks just asked about them.
>    Mark
>
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
>
-------------- next part --------------
   Below are links to the my slides and code.

   Slides: [1]http://slides.com/jameswhisnant/cats
   Code: [2]https://bitbucket.org/jwhisnant/cats

   Some other resources that may be of interest:

   Using Python and Neo4j for Data Analytics
   [3]https://www.youtube.com/watch?v=Nkd6Ei-xuxI

   Cycli, a helpful neo4j-shell client
   [4]https://github.com/nicolewhite/cycli

   How to build a Python web application with Flask and Neo4j - PyCon SE 2015
   [5]https://www.youtube.com/watch?v=ZMOHEh-caTc

   Code from the video above.
   [6]https://github.com/nicolewhite/neo4j-flask

   Enjoy,
   James
   On Fri, Mar 25, 2016 at 10:33 AM, Mark Hutchinson via TriZPUG
   <[7]trizpug at python.org> wrote:

     ? ?Are the slides for last night's presentation available somewhere??
     One of
     ? ?the GraphDB meetup folks just asked about them.
     ? ?Mark
     _______________________________________________
     TriZPUG mailing list
     [8]TriZPUG at python.org
     [9]https://mail.python.org/mailman/listinfo/trizpug
     [10]http://tripython.org is the Triangle Python Users Group

References

   Visible links
   1. http://slides.com/jameswhisnant/cats
   2. https://bitbucket.org/jwhisnant/cats
   3. https://www.youtube.com/watch?v=Nkd6Ei-xuxI
   4. https://github.com/nicolewhite/cycli
   5. https://www.youtube.com/watch?v=ZMOHEh-caTc
   6. https://github.com/nicolewhite/neo4j-flask
   7. mailto:trizpug at python.org
   8. mailto:TriZPUG at python.org
   9. https://mail.python.org/mailman/listinfo/trizpug
  10. http://tripython.org/

From cbc at unc.edu  Mon Mar 28 16:12:35 2016
From: cbc at unc.edu (Chris Calloway)
Date: Mon, 28 Mar 2016 16:12:35 -0400
Subject: [TriPython] James' slides?
In-Reply-To: <CABGiAJHZH4Z61-T5k3onDOoT4TYrVC-EJ2bsaGEJuXb39QawjQ@mail.gmail.com>
References: <153ae3194c0-6a91-f7d8@webstg-a04.mail.aol.com>
 <CABGiAJHZH4Z61-T5k3onDOoT4TYrVC-EJ2bsaGEJuXb39QawjQ@mail.gmail.com>
Message-ID: <56F99033.8090001@unc.edu>

On 3/26/16 4:17 PM, James Whisnant wrote:
>     Below are links to the my slides and code.
>
>     Slides: [1]http://slides.com/jameswhisnant/cats
>     Code: [2]https://bitbucket.org/jwhisnant/cats

Now linked at http://tripython.org/meetings

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From cbc at unc.edu  Tue Mar 29 10:57:22 2016
From: cbc at unc.edu (Chris Calloway)
Date: Tue, 29 Mar 2016 10:57:22 -0400
Subject: [TriPython] TriPython April 2016 Meeting: Splitsville: News from
 the World of Regular Expressions
Message-ID: <56FA97D2.3090404@unc.edu>

http://tripython.org/Members/cbc/apr-16-mtg

When: Thursday, April 28, 7pm
Where: Renaissance Computing Institute (RENCI)
        Biltmore Conference Room, 5th Floor
        100 Europa Drive, Suite 590, Chapel Hill
What:

"""
Rex Dwyer, PhD, will survey some old and new features of regular 
expressions as implemented in the regex module ( 
https://pypi.python.org/pypi/regex ) which augments the re module in the 
Python standard library. Rex will concentrate on look-around and split, 
solving a couple of problems involving biological sequences. 
Extemporaneous "lightning talks" of 5-10 minute duration are also 
welcome and don't need to be pre-announced. Lightning talks are for you 
to "show and tell" something you've learned about Python recently, no 
matter how small. We all use Python, therefore, we are always learning 
something new about Python that we can tell others. Plenty of free 
parking is available in the RENCI parking deck. The meeting will be 
followed by our usual after-meeting at a nearby tavern for food and 
beverage. Come join us for a fun and informative evening.
"""

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From cbc at unc.edu  Tue Mar 29 10:57:25 2016
From: cbc at unc.edu (Chris Calloway)
Date: Tue, 29 Mar 2016 10:57:25 -0400
Subject: [TriPython] James' slides?
In-Reply-To: <CABGiAJHZH4Z61-T5k3onDOoT4TYrVC-EJ2bsaGEJuXb39QawjQ@mail.gmail.com>
References: <153ae3194c0-6a91-f7d8@webstg-a04.mail.aol.com>
 <CABGiAJHZH4Z61-T5k3onDOoT4TYrVC-EJ2bsaGEJuXb39QawjQ@mail.gmail.com>
Message-ID: <56FA97D5.3060201@unc.edu>

On 3/26/16 4:17 PM, James Whisnant wrote:
>     Below are links to the my slides and code.
>
>     Slides: [1]http://slides.com/jameswhisnant/cats
>     Code: [2]https://bitbucket.org/jwhisnant/cats

Now linked here for your convenience:

http://tripython.org/meetings

Thanks, James.

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530

From cbc at unc.edu  Tue Mar 29 14:41:26 2016
From: cbc at unc.edu (Chris Calloway)
Date: Tue, 29 Mar 2016 14:41:26 -0400
Subject: [TriPython] Python Jobs in Miami
Message-ID: <56FACC56.7020602@unc.edu>

My friend Mikko Ohtamaa is hiring Python people in Miami. Applicants 
should be able to get along with a Finnish sense of humor. He promises a 
life of adventure, fun, and beer.

http://codepen.io/miohtama/pen/zqdBBB

mikko at opensourcehacker.com

-- 
Sincerely,

Chris Calloway, Applications Analyst
UNC Renaissance Computing Institute
100 Europa Drive, Suite 540, Chapel Hill, NC 27517
(919) 599-3530