django-taggit vs PostgreSQL ArrayField - I know the differences, but what are the technical implications

Hey guys.

I'm currently working with django-taggit for my "Tag" fields, because for quick prototyping I just use sqlite. However now I'm almost done and I have to work on a more serious setup. I will be using PostgreSQL as my main production (and dev) database. And I like to use as few external third-party packages as possible. That includes django-taggit. I would like to replace this with a Postgres ArrayField. Since django-taggit uses a `form.save_m2m()` it looks like it just uses a ManyToMany Field. And I understand that also.

But I don't have enough in-depth knowledge. What are the actual technical implications? Are ArrayFields significantly faster? Are there any up/down-sides I'm not seeing for either of the two? Is there even any significant difference between the two?

Thanks so much in advance. I hope this is of interest to others as well.

/r/django
https://redd.it/and0gd

[D] Sharing my personal resource list for deep learning comprehension

Since I always like to have some theoretical knowledge (often shallow) of modern techniques, I complied this list of (free) courses, textbooks and references for an educational approach to deep learning and neural nets.

* [Deep Learning (CS 1470)](http://cs.brown.edu/courses/cs1470/index.html)
* [Deep Learning Book](https://www.deeplearningbook.org/) [\[GitHub\]](https://github.com/janishar/mit-deep-learning-book-pdf) [\[tutorial\]](http://www.iro.umontreal.ca/~bengioy/talks/lisbon-mlss-19juillet2015.pdf) [\[videos\]](https://www.youtube.com/channel/UCF9O8Vj-FEbRDA5DcDGz-Pg/videos)
* [Dive into Deep Learning](https://d2l.ai/) [\[GitHub\]](https://github.com/d2l-ai/d2l-en) [\[pdf\]](https://en.d2l.ai/d2l-en.pdf) [\[STAT 157\]](http://courses.d2l.ai/berkeley-stat-157/index.html)
* [Neural Network Design](http://hagan.okstate.edu/nnd.html) [\[pdf\]](http://hagan.okstate.edu/NNDesign.pdf)
* [Neural Networks and Deep Learning](http://neuralnetworksanddeeplearning.com/) [\[GitHub\]](https://github.com/mnielsen/neural-networks-and-deep-learning) [\[pdf\]](http://static.latexstudio.net/article/2018/0912/neuralnetworksanddeeplearning.pdf) [\[solutions\]](https://github.com/reachtarunhere/nndl/blob/master/2016-11-22-ch1-sigmoid-2.md)
* [Theories of Deep Learning (STATS 385)](https://stats385.github.io/) [\[videos\]](https://www.researchgate.net/project/Theories-of-Deep-Learning)
* [Theoretical Principles for Deep Learning (IFT 6085)](http://mitliagkas.github.io/ift6085-dl-theory-class-2019/)

Do with it, as you will. Any new books/updates that I'm missing here?

/r/MachineLearning
https://redd.it/anrams

Looking for some Django buddies

Hello everyone!

I started learning web development last year somewhere around January and I've noticed that more I learn, less people are interested when I talk about web stuff. Lately all I get are headnods and "mhm" replies. It kinda sucks because I really enjoy learning these things and would like to share with someone, but my family and friends have zero interest in this stuff.

I've been following this community for a while now and I can see that there are a lot of skilled people that share the same interest as me, so if there's someone who would like to talk with me from time to time, whether you're a guy or a girl, expert or beginner like me, just let me know! :)

I'm from Slovakia, so I'm looking for someone who's preferably from Europe, can speak English, Slovak or Czech language and is at least 18 years old (since I'm 26 and feel like I don't belong in the teen category anymore)..

I'm using Discord for communication, so just message me your Discord tag and I will add you right away. :D

​

Thank you!

​

​

/r/django
https://redd.it/anttdx

Question about * instead of a line number

Good Afternoon - Really sorry about posting a thread about this but i'm at my wits end here trying to figure this out.

I'm working in Jupyter (new to python) and am simply trying to run any code... at all. I have been unsuccessful. When i put any code in and hit run, an asterisk shows up instead of a line number and Jupyter creates a new line. So i'm expecting \[1\], \[2\], etc and instead i get \[\*\] for any and all types of code i try to run. I haven't been able to run one line of code in Jupyter using either the play button or hotkeys.

Obvi i am a beginner but i've been working with R for a little and wanted to try Python out. Ran across Jupyter from the IBM Coursera program. Anyone know how to fix this? i can't seem to find an answer for this anywhere and its probably something super simple and i'll feel stupid but please help anyone lol......

/r/IPython
https://redd.it/anvisy

Proper way to host user images with Django?

I’m looking for some information on how to keep user uploaded images with Django. It doesn’t seem like I should just keep them in the media folder. What’s the proper way to do it in a production environment with a lot of users? Any links to teach this would be appreciated.

/r/djangolearning
https://redd.it/anvw12

"How to learn programming in one day"

/r/Python
https://redd.it/anzns5

Full Stack React & Django [1] - Basic REST API
https://www.youtube.com/watch?v=Uyei2iDA4Hs

/r/djangolearning
https://redd.it/anwopu

Al Sweigart, author of many python books is now streaming on Twitch!
https://www.twitch.tv/alsweigart

/r/Python
https://redd.it/ao0bxg

Cookies vs. Sessions

When a decision has to be made when it comes utilizing a cookie or a session what factors are taken into account? Essentially I'm looking for commonly used practices between the two concepts.

/r/flask
https://redd.it/ao0np5

Try out the walrus operator in Python 3.8
https://medium.com/hultner/try-out-walrus-operator-in-python-3-8-d030ce0ce601

/r/Python
https://redd.it/ao5e8y

Creating a Custom User Model in Django
https://testdriven.io/blog/django-custom-user-model/#.XFw52KxTZ0E.reddit

/r/django
https://redd.it/ao3zxv

What is Python? Why Python? Why has it become so popular in so little time? Do you also have these questions in your mind? Do watch this video to learn more about this awesome programming language. #IntroductionToPython #PythonBasics #PythonForBeginners
http://intellipaat-youtube.clickable.cards/card/HBAZAc

/r/IPython
https://redd.it/ao7378

[P] How to use BERT in Kaggle Competitions - A tutorial on fine-tuning and model adaptations

A step-by-step tutorial on how to adapt and finetune BERT for a Kaggle Challenge classification task: The [Kaggle Toxic Comment Classification Challenge](https://www.kaggle.com/c/jigsaw-toxic-comment-classification-challenge).

This post covers pretty much everything from data processing to model modifications with code examples for each part.

Results are in the top-10% of this $35.000 competition with a single model modified in 30 lines of code.

Link: [https://medium.com/huggingface/multi-label-text-classification-using-bert-the-mighty-transformer-69714fa3fb3d](https://medium.com/huggingface/multi-label-text-classification-using-bert-the-mighty-transformer-69714fa3fb3d)

/r/MachineLearning
https://redd.it/ao23cp

Flask has overtaken Django according to the 2018 JetBrains Developer Survey
https://www.jetbrains.com/research/python-developers-survey-2018/

/r/Python
https://redd.it/ao5dml

Python packages for writing better code

It would be interesting to curate a list of tools that help us write better Python code and save us time. With the exception of the version control tools, everything below is a Python package.

​

**Testing**

Writing and running tests makes it easier to develop robust code.

* [pytest](https://docs.pytest.org/en/latest/) (3,594 stars) - Popular testing framework, can run doctests too.
* [hypothesis](https://hypothesis.readthedocs.io/en/latest/) (3,223 stars) - Property-based testing, e.g. testing `f(a, b) = f(b, a)` for every `a, b`.

**Code linting and and formatting**

Code linting alerts of style violations, while a code formatter also automatically fixes the code.

* [flake8](http://flake8.pycqa.org/en/latest/) (497 stars) - Checks the code for PEP8 violations.
* [black](https://github.com/ambv/black) (7,552 stars) - Automatically formats code, saving you time.

**Documentation**

Tools for documentation, which automate the documentation process.

* [sphinx](http://www.sphinx-doc.org/en/master/) (2,376 stars) - Build docs to html, pdf and other formats. Automatically generate docs from code.

**Version control**

Version control allows going back to checkpoints, creating development branches, cooperating, etc.

* [git](https://git-scm.com/downloads) \- Popular version control tool.
* [github](https://github.com/) \- A platform for projects under git source control. Cooperation and community.

​

​

The above are tools that make my life easier when writing code. There are probably many tools that I do not know about, which could potentially save me even more time and make my code

/r/Python
https://redd.it/ao52qn

Wrote a python script to convert video to ascii videos (with audio)
https://youtu.be/Uh2_dVDH9s4

/r/Python
https://redd.it/aoc0t7

Looking for help with a process.

I have a variable in the form:

y = m[i]*t + b[i]

where I have values for m and b stored in lists. I'm interested in using a loop (or any other suggestion) to have the variable expand, similar to a summation.

y = m[0]*t + b[0] + m[1]*t + b[1] + ... + m[n]*t + b[n]

I would like to have the code accomplish the expansion for me as the goal is to have the number n determined by a user. It's similar to Fourier coefficients.

I greatly appreciate any tips, help or suggestions in this matter. Sorry if I committed any faux-pas up to this point as well.

/r/Python
https://redd.it/aoczku

How a production ready Dockerfile for Django projcet should look like?

It is clear that Docker is a buzzword for developers and I want to use it for my Django projects. The problem is that I can't find any material to learn how to correctly write a production ready Dockerfile for a Django project. Almost in every tutorial I see something like this in Dockerfile they write: **command: bash -c "python manage.py makemigrations && python manage.py migrate && python manage.py runserver 0.0.0.0:8000"**

And they call it "Production ready Dockerfile". What the f\*ck?! You don't run your server with [manage.py](https://manage.py) runserver command in production. Who the hell does?! I am freaking out that how it is possible that everyone loves Docker, everyone uses it, but no one teaches it correctly. So I need your help people to, get out this f\*cking situation. Thanks in advance.

/r/django
https://redd.it/aobpp8

Gita: a command-line tool to manage multiple repositories

I wrote a command-line tool to manage multiple repositories called [gita](https://github.com/nosarthur/gita). It can do two things

* display the status of multiple git repos such as branch, modification, commit message side by side
* delegate git commands/aliases from any working directory

[screenshot](https://raw.githubusercontent.com/nosarthur/gita/master/screenshot.png)

The color coding represents the relationship between local and remote branches, and the extra symbols (+, \*, and \_) denote the dirtyness of edits.

To install, simply run `pip3 install -U gita`

/r/Python
https://redd.it/aodcvh

Flask has overtaken Django according to the 2018 JetBrains Developer Survey
https://www.reddit.com/r/Python/comments/ao5dml/flask_has_overtaken_django_according_to_the_2018/

/r/flask
https://redd.it/aoeflq

IntegrityError: Duplicate Primary Key issue with postgres

Hi,

The database has a few entries that were removed which leaves a gap in the Primary Keys. When testing backup and restore on my dev server, the Primary Key was reset to 1, fine, this is to be expected. However, running:

python manage.py sqlsequencereset microblog

Resets it to the next free number, This is no good, as the ID sequence in the current test db is:

1,2,7,10,12,13,14,17,23,24,25,26

so resetting to 3, just means this will fail in 4 database entries time. I have also tried:

psql
SELECT setval('microblog_blog_id_seq', (SELECT MAX(id) FROM microblog_blog)+1);

Whilst it returns the correct number in the console, and I am able to add another post, looking at the database table in pgAdmin, shows that it has picked the number 3 again, not 27 which is what I want it to do. Literally, I want it to treat any number < max as a no go value.

How can I do this? and if anyone knows why this is not the default behaviour I would be interested to know the reason why?

&#x200B;

/r/django
https://redd.it/aofxtc