[Chennaipy] Chennaipy Digest, Vol 36, Issue 12

Tue Aug 30 01:38:43 EDT 2016

Hi All,

Went through the meeting notes, it would be great if there is a place where
can i get the presentation or recordings of the talks?

Thanks!
Sai

On Mon, Aug 29, 2016 at 4:13 PM, <chennaipy-request at python.org> wrote:

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> Today's Topics:
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>    1. Re: August Meetup - Minutes (hafizul azeez)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 29 Aug 2016 16:13:31 +0530
> From: hafizul azeez <hafizul.azeez at gmail.com>
> To: Chennai Python User Group Mailing List <chennaipy at python.org>
> Subject: Re: [Chennaipy] August Meetup - Minutes
> Message-ID:
>         <CAAAE1MpFJjB3t3m6fKrBn2qkd30o8RWnV4SH-y+1MBA-_-pT+A at mail.
> gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Anand,
>
> It's easily doable. You can use Flask web framework to do it. You can send
> a request via ajax from the client (browser) to the server with the input
> being a random number between 1 and 100 (or the max number of quotes) you
> have in your db or for that matter in a text file.
>
> The server takes the request, checks the paramater (the random number) and
> picks the appropriate row id from the database and return it as json or as
> a python object which you can format (using jinja templates) and write to
> the DOM of the browser.
>
> I suggest you start with a Flask tutorial - which will give you a general
> idea :
> http://code.tutsplus.com/tutorials/creating-a-web-app-
> from-scratch-using-python-flask-and-mysql--cms-22972
>
>
> Thanks
> Azeez
>
> On 29 August 2016 at 15:59, Anand Surampudi <asinode at zoho.com> wrote:
>
> > Sure Azeeze. I will work on that. Thanks for your constant push.
> >
> > Meanwhile, can you or anybody suggest a resource for learning how to
> > achieve a small task in python. What I want to do is to build a web page
> > that randomly generates a quote on every click of a button. Lets just
> say I
> > want to host this page on github pages. I know how content-based github
> > pages work since I maintain my blog there. But this is something I want
> to
> > learn using github pages and python. This is it.
> >
> > I am sure this sounds pretty silly. But as a beginner, I would like to
> > give myself this kind of tasks for my learning.
> >
> > On script level, I can do it. I mean I run the script on terminal and it
> > definitely throws the random quote as an output. But I want the same
> thing
> > to happen on a web page, but random printing should happen on every click
> > of a button, say something like, "Surprise me!" or something.
> >
> > Thanks.
> > Anand
> >
> > On Mon, Aug 29, 2016 at 2:50 PM, hafizul azeez <hafizul.azeez at gmail.com>
> > wrote:
> >
> >> Anand,
> >>
> >> Hope you are getting well now!
> >>
> >> I gave my first talk (ah.. finally) after 3 meetups - though it was
> >> unprepared. I encourage you to do the talks sometime. We would love to
> hear
> >> from you - your thoughts and experiments with python.
> >>
> >> Azeez
> >>
> >>
> >> On 29 August 2016 at 14:31, Anand Surampudi <asinode at zoho.com> wrote:
> >>
> >>> Azeez,
> >>>
> >>> You really made me feel so bad. You forced me to see how much I missed.
> >>> Just kidding! ;-)
> >>>
> >>> But from your minutes, I seriously regret not making it yesterday as I
> >>> was down with fever. That was very elaborate record of minutes and
> thanks a
> >>> lot for initiating this. I will try to make use of the material that is
> >>> hopefully going on github soon.
> >>>
> >>> Anand
> >>>
> >>> On Mon, Aug 29, 2016 at 10:57 AM, hafizul azeez <
> hafizul.azeez at gmail.com
> >>> > wrote:
> >>>
> >>>> The non-stop drizzle, the quiet IMSc environment and vibrant
> >>>> pythonistas set the context and expectations for the August meetup.
> >>>> However, plans took unexpected turns when the speakers got delayed
> due to
> >>>> the drizzling rain outside and the traffic created by it. Vijay took
> the
> >>>> stage to engage the audience with round of introductions and a
> generic Q&A
> >>>> session on python and the community. All of them took the opportunity
> to
> >>>> introduce themselves and a few asked some interesting questions. With
> the
> >>>> speakers not turning up yet, Vijay announced a lightning talk session.
> >>>>
> >>>> Rengaraj from Zilogic systems took the opportunity to present an idea
> >>>> he was working with (DBus), explained the design and asked for
> feedback and
> >>>> contributions. Kudos to Rengaraj - though it was a lighting talk,
> taking to
> >>>> the stage with no slides and preparation within few minutes summons
> respect
> >>>> and appreciation.
> >>>>
> >>>> An introduction to Flask by Hafizul Azeez
> >>>>
> >>>> As an emergency talk, Azeez gave a brief description of Flask and how
> >>>> it can be used for rapid application development. Azeez highlighted
> the
> >>>> difference between the micro web framework, Flask and how it is
> compared
> >>>> with a batteries included framework like Django. He gave a brief demo
> of
> >>>> how a simple Flask web app looks like and explained the code behind
> the app.
> >>>>
> >>>> He also made slight changes to the code with the inclusion of html
> >>>> templates and how parameters can be passed from the client side to the
> >>>> server side thru Flask routes a.k.a end points. In the process, he
> said how
> >>>> the Flask framework supports a design pattern called MVT (Models,
> Views and
> >>>> Templates) and how it all works in orchestration to make the web app.
> >>>>
> >>>> He also gave additional inputs on extending the Flask app with Plugins
> >>>> and highlighted a few prominent plugins like FlaskWTF (for Forms),
> >>>> Flask-SQLAlchemy (for databases), Flask-Login (for managing user
> logins,
> >>>> authentications, session management and cookies) and few additional
> modules
> >>>> (like Jsonify). Overall, the session received positive inputs
> considering
> >>>> that it was planned to be a filler (till speakers arrive) lightning
> talk
> >>>> but turned to be a 20 minute talk.
> >>>>
> >>>> This talk was followed by tea and networking. The cool weather outside
> >>>> (something Chennai misses too often) and the hot tea and coffee inside
> >>>> added energy to the already pumped up pythonistas. Getting to know new
> >>>> people, shaking hands, answering queries, taking feedback accompanied
> with
> >>>> good weather - whoa, just awesome! Speakers turned up sometime back
> and two
> >>>> more talks to go as per schedule.
> >>>>
> >>>> Computer Vision with Deep Learning by Manish Shivanandhan
> >>>>
> >>>> Manish started with an introduction of deep learning and how machine
> >>>> learning and deep learning differs. Machine learning is more of
> recognising
> >>>> patterns and deep learning is more of learning about patterns. Manish
> >>>> covered the different types of learning - supervised, unsupervised and
> >>>> reinforcement and gave examples for each of these types; along with
> >>>> classification and regression and provided real life examples (housing
> >>>> prices, stock prices etc) to compliment the understanding.
> >>>>
> >>>> Coming to neural networks, Manish hinted various algorithms are used
> >>>> for deep learning and one of them being Neural networks. He also
> deciphered
> >>>> as to why Neural networks is getting so much traction these days!? -
> and
> >>>> attributed it to the increasing computer processing power and the
> exploding
> >>>> amounts of data.
> >>>>
> >>>> He also highlighted the use cases of Neural networks and its
> advantages
> >>>> and limitations. Prominent examples being:
> >>>> Computer vision - pattern recognition in images
> >>>> Creative usage - generating text/music/speech
> >>>>
> >>>> One interesting exampling Manish gave is the JK Rowling (Author of
> >>>> Harry Potter series) case and how Neural networks helped identify
> when one
> >>>> of her books was written in another pen name (which was not JK
> Rowling).
> >>>> This captivated the audience much more as this is some thing almost
> all of
> >>>> the audience can correlate with. He also stressed the importance of
> Neural
> >>>> networks in the health care domain in finding cure for diseases.
> >>>>
> >>>> He covered how neural networks can be used in Computer vision and deep
> >>>> learning. He gave insights into how to take a problem and represent
> it in
> >>>> numbers so that deep learning can be used. He also hinted that if any
> >>>> problem can be represented in numbers, deep learning can be used. He
> demoed
> >>>> with an image, flattening it and showing the numbers behind it and
> >>>> highlighted that with enough numbers and processing power, patterns
> can be
> >>>> learnt by Neural networks. He complimented that with the Prisma case
> study
> >>>> where researchers took a lot of art manually, scanned it and fed
> neural
> >>>> networks to learn how the great artists like Picaso would have
> painted the
> >>>> picture (the brush strokes, the pressure applied etc). So when an
> image
> >>>> (like selfie) is fed into the Prisma application, the computer
> generates
> >>>> the art form of the image- i.e. how the image would look like if it
> was a
> >>>> painting from Picaso and the likes. This further stressed how deep
> learning
> >>>> can be used and how neural networks can be trained provided sufficient
> >>>> clean data is fed into it.
> >>>>
> >>>> Finally, he gave an introduction to TensorFlow and its distinct
> >>>> abilities when compared to other frameworks like Theano. Manish
> finished
> >>>> his talk with resources and references for further exploration of
> Neural
> >>>> networks and details about his upcoming webinar. Oh yes, he answered
> a lot
> >>>> of questions on deep learning from an inquisitive audience who were
> awed by
> >>>> the potential of deep learning and bitten by Manish's enthusiasm.
> >>>>
> >>>> Behaviour Driven Development by Naren Ravi
> >>>>
> >>>> Naren provided the background of the talk with a short description of
> >>>> what Behaviour Driven Development (BDD) is all about - i.e. testing
> the
> >>>> code with the user in mind and meeting the expectation of the
> stakeholders
> >>>> rather than just testing the code.
> >>>>
> >>>> He started with the waterfall model, the advantages and it's
> >>>> limitations. He gave insights into why testing in the later stages of
> the
> >>>> cycle makes life difficult - if bugs encountered and to finally
> discover
> >>>> that the design itself is flawed bringing up frustrations.
> >>>>
> >>>> He then covered how the first optimisation on the waterfall model was
> >>>> done with testing the code and informing the development and how
> further
> >>>> optimisation was done to the waterfall model with both testing and
> >>>> construction (coding) done parallely. Though these optimisations were
> done,
> >>>> Naren stated that there was an inherent disadvantage that was left
> with -
> >>>> i.e. the design cannot be tested. The solution is to bring the design
> into
> >>>> the development i.e testing, coding and design all tested parallely
> which
> >>>> is the Test Driven Development (TDD).
> >>>>
> >>>> Naren then added that even TDD won't suffice as the requirement
> >>>> analysis stage is completely left out. He then questioned the
> possibility
> >>>> of scope (requirements) change and how the SDLC model would adopt it!?
> >>>> Bringing the analysis cycle into the above cycle of testing, code and
> >>>> design becomes the BDD, he concluded. This gave an overall picture of
> the
> >>>> BDD - testing (test cases) first, construction (coding) and the
> design and
> >>>> finally checking if all of it matches the requirements.
> >>>>
> >>>> He added that in some context, this is how lean startup works. Develop
> >>>> a product with a new feature, send it to market, get feedback and
> then add
> >>>> a new feature, send it to market, gauge the reactions and the cycle
> goes
> >>>> on. Overall, it was a well structured talk starting with the
> traditional
> >>>> waterfall model to TDD to BDD and what optimisations were made on the
> way.
> >>>> He answered a few questions later to help bring more clarity into BDD.
> >>>>
> >>>> The meetup ended with Vijay thanking the venue and networking over tea
> >>>> sponsors, speakers and the rest who made the meetup a successful
> event. He
> >>>> also asked attendees to register in the mailing list to keep abreast
> of the
> >>>> happenings in the Chennaipy community.
> >>>>
> >>>> Regards
> >>>> Azeez
> >>>>
> >>>> _______________________________________________
> >>>> Chennaipy mailing list
> >>>> Chennaipy at python.org
> >>>> https://mail.python.org/mailman/listinfo/chennaipy
> >>>>
> >>>>
> >>>
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