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Question, Tips and Tricks, Best Practices on Python Programming Language
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Python Fractal Landscape

/r/Python
https://redd.it/7cffpd
Deconstructing Data Science

Hey everyone! 👋

Yesterday I launched the second post of a new Data Science blog, where I’m open-sourcing every resource I find and insight I come across in pursuit of becoming a world-class (top 5%) Data Scientist in < 6 months.

The purpose of this post is to empower others to start accelerating their own learning by:

1) deconstructing the complex craft of Data Science into it’s simple micro-skills

2) identifying the 20% of skills that contribute to 80% of outcomes

I'm writing this with learners like you and I in mind, so if you're also interested in accelerating your learning, check it out & feel free to share around:

https://ajgoldstein.com/2017/11/12/deconstructing-data-science/

/r/pystats
https://redd.it/7cgpom
I Made a Massively Multiplayer Board Game to Test Django Channels

http://codewords.io/

I've been trying to get permission to run a game of it from the publisher and designer (CGE & Vlaada Chvátil) but I haven't heard back. I've found demonstrating that there's interest in what you're doing is the best way to get ahold of people. So..

Anyone interested in trying a massive game of Codenames over Twitch? Not quite "For Science!" more "For Engineering!" Which, let's be honest here, has a much better ring to it.

If you'd like to know more, I put up an FAQ up here: http://codewords.io/faq/

If you'd like to sign up to help, there's a form over there: http://codewords.io/

Screenshots and a game play overview can be found somewhere under this: https://imgur.com/a/3xtZC

Never haven’t heard of Codenames?! You’re in for a treat, it's one of this (or any) decade's best games. Here’s the super short rulebook (https://czechgames.com/en/codenames/downloads/).. And a video: https://www.youtube.com/watch?v=emlI43ZE9-c

/r/django
https://redd.it/7cieeu
Please recommend good Python books for the following topics.

Hey Redditors,

I am looking for books on following topics using python programming:

* Automata with Python
* Design & Algorithm with Python
* Operational Research with Python
* Probability & Vectors with Python.

Thanks.

/r/Python
https://redd.it/7cj6v2
Show generated image file to html

I have generated image file from matplotlib with various filename, like this :

figure_name="Sentiment_Analysis_of_{}_Tweets_About_{}".format(number, query)
plt.savefig("{}.png".format(figure_name))
full_filename=figure_name+'.png'
return render_template("index.html", figure_filename=full_filename)

how to return the generated image to html?
I use this code but it doesn't work

<img src="/{{ figure_filename }}" class="img-fluid" alt="">

/r/flask
https://redd.it/7br7sx
Question about thread model of Flask application

Would it be safe to have the built-in Flask webserver running in the same process with other background tasks?
Performance should not be a problem as only 1-2 Users are accessing the system at a time. It would be very convenient to have only a single process with shared data running and the possibility to have application internal events shared between tasks.

/r/flask
https://redd.it/7bkv62
url variable

How do you get the url variable in flask.

http://localhost/page?a=22

How do I print the value of a in jinga2.

/r/flask
https://redd.it/7bcn72
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Compressible aerodynamics calculator: made using PyQt5/PySide

/r/Python
https://redd.it/7ck72z
Django-UserForeignKey - Automatically set the current user on a model (e.g., for created_by information)

Hi there,

today I want to show the Django community a library called **django-userforeignkey** (disclaimer: I know the author of the package in person, and I have contributed to that package too), that essentially allows you to add **created_by** and **last_modified_by** information to your Django Models like this:

class MyModel(models.Model):
title = models.CharField(max_length=128)
description = models.TextField()
created_by = UserForeignKey(auto_user_add=True)
created_at = models.DateTimeField(auto_now_add=True)
last_modified_by = UserForeignKey(auto_user=True, auto_user_add=True)
last_modified_at = models.DateTimeField(auto_now_add=True, auto_now=True)


And all of that comes without needing to read request.user in your views or forms! It's all done "automatically".

The github repo of **django-userforeignkey** including a quickstart guide is available here: https://github.com/beachmachine/django-userforeignkey - it's also published on pypi
I showcased this library in a video which is available here: https://youtu.be/iJCbYMgUDW8


/r/django
https://redd.it/7cq29w
Senior Python Programmers, what tricks do you want to impart to us young guns?

Like basic looping, performance improvement, etc.

/r/Python
https://redd.it/7cs8dq
Is there a way to put the result at the top of a notebook?

I've recently started using Jupyter Notebooks. I'm using Folium in them to create interactive maps. [HERE](http://gis.ironcountywi.org/jupyter/Remon_Project_2018-C.html) is a simple example. Is there a way to get the final map to the top of the Notebook so people see it first and don't have to scroll down to see how it was produced unless they want to? Thanks.

/r/IPython
https://redd.it/7cs7eu
so. just spend 7 hours trying to set up my Android app to connect with django's csrf. let me save you some time

all of the everything about connecting to django using csrf and authentication talks about AJAX, and there is very little information about actually connecting with Android. Throw in the fact that Android httpurlconnection objects are obtuse, have terrible documentation, and there are no good tuturials about cookies that don't use some random persons half-baked personal library, and you get me spending 7 hours trying to get my app to log in.

so here heres how to do it.

#YOU NEED TO SET THE FULL COOKIE, NOT JUST THE CSRF TOKEN

**WRONG:**

csrftoken=3JR5KZ4tHrDRlPvVwufhrT8Zn83sklwk;

**CORRECT:**

csrftoken=3JR5KZ4tHrDRlPvVwufhrT8Zn83sklwk; expires=Tue, 13-Nov-2018 00:29:33 GMT; Max-Age=31449600; Path=/

grumble grumble grumble

I literally went into django.middleware.csrf and put in a bunch of print statements to try to figure out what was happening.

edit:

heres the full android code for setting the cookies (lots of non-important details omited):

URL url = new URL(serverURL + myurl);
//URL url = new URL(myurl);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestProperty("Content-Type","application/json");
//getFullCSRFcookie() returns the full cookie string with time stamps and everything
urlConnection.setRequestProperty("Cookie", getFullCSRFcookie());
urlConnection.connect();


Edit: love how the only comments basically boil down to "I don't know what your project is, but you're doing it wrong." Lol you keep being you, reddit

/r/django
https://redd.it/7crsn5