Functional linked lists in Python
https://dbader.org/blog/functional-linked-lists-in-python

/r/Python
https://redd.it/6ytmey

[AF] How to display a Tree-data structure.

The Title already says almost everything.

I got this simple Tree Data structure where there are nodes and edges and want to display them. I don t know if it s possible to do this with jinja2 or some Flask Framework, could not find anything with google.

Any help, even knowing that it s not possible with Flask to do that, is appreciated

/r/flask
https://redd.it/6ytp97

A utility for organizing your downloads directory
https://github.com/chriscz/pysorter

/r/Python
https://redd.it/6yttvj

Python Namesilo module

Hello,

I'm developing Python module (api wrapper) for [Namesilo service](https://www.namesilo.com/api_reference.php). It's open source and it's my first module in Python. I'm looking for some advice what to improve, what am I doing wrong or right. You can find module on my github [python-namesilo](https://github.com/goranvrbaski/python-namesilo)

Thanks!

/r/Python
https://redd.it/6yuiai

The gamification package Django has been missing
https://github.com/mattjegan/django-gamification

/r/django
https://redd.it/6yu953

PEP 557 -- Data Classes
https://www.python.org/dev/peps/pep-0557/

/r/Python
https://redd.it/6yvf5e

PyNomaly: outlier / anomaly detection using Local Outlier Probabilities (LoOP)

Hi all! I've been lurking on this sub for a little while now and thought I'd post a side project I have been working on. It's called PyNomaly, which uses Local Outlier Probabilities (LoOP) to score individual data points on the probability that they are an outlier. You can check it out [here](https://github.com/vc1492a/PyNomaly).

I'm looking for some feedback and folks that could try it out, do some testing and open some issues if there are any. Would appreciate some feedback from the community so I can improve the package! I hope some of you find it useful.



/r/pystats
https://redd.it/6yvu6m

PEP 556 -- Threaded garbage collection
https://www.python.org/dev/peps/pep-0556/

/r/Python
https://redd.it/6yvea0

Paco - a coroutine-based library for concurrent programming based on asyncio with a clean api

I just wanted to give a shout-out to what I think is an excellent library that deserves more attention.

Utilizing the stdlib's asyncio module but providing a clean, functional api on top of it is a dream.

I highly recommend people take a look


https://github.com/h2non/paco

/r/Python
https://redd.it/6yx16r

Show r/python: wav2vec, a script/package for converting wave files to vector graphics
https://github.com/cristoper/wav2vec

/r/Python
https://redd.it/6yy2iq

How to Generate FiveThirtyEight Graphs in Python
https://www.dataquest.io/blog/making-538-plots/

/r/Python
https://redd.it/6yxw95

beginners guide

iam looking for a pdf to learn python iam using rasberry pi 3+.It comes with two software packages python 2.7.9 and python3.4.2
Thanks for any tips

/r/Python
https://redd.it/6z0ccr

Help generating a form to fill out user profiles

Hello,

I'm building a user profile page in my django app and I have the user info in the database already. I extended the base User model with a OneToOneField like so:

**models.py**:

class UserProfile(models.Model):

user = models.OneToOneField(User, on_delete=models.CASCADE)
location = models.CharField(max_length=30, blank=True)
birthdate = models.DateField(null=True, blank=True)
...
# A few other custom fields

def __str__(self): # __unicode__ for Python 2
return self.user.username

Now I'm trying to give users the ability to edit their profiles so I created a form:

**forms.py**:

from django import forms
from models import UserProfile

class UserProfileForm(forms.ModelForm):
class Meta:
model = UserProfile
exclude = ['user']
# I excluded 'user' because it renders as a dropdown with all the usernames from the database lol

I can place it in my profileUpdate.html template just fine, however I want to give users the ability to modify their first/last name from the User object but those items come from a different model. So, simple question I hope: how do I get the first/last name and email from the regular old django User model to be editable in this profile form? I wanted to use the model to generate the form so that I could use django's built in form validation.

If you need any more info please let me know. Thanks! :)





/r/django
https://redd.it/6z0l64

Looking for advice on writing custom Django roles

Hello,

I need to build custom Django user roles, and i need an advise on the best approach (or library that i can use) to achieve that:

1. There will be 3 different user levels:
* Author
* Editor
* Verification
2. Every user must be limited to a city, based on custom field (New York, Berlin, Amsterdam, etc)
3. Only ‘Author’ can add content, while ‘Editor’ and ‘Verification’ can edit the content.
4. Author: Can only view/edit the content created by them.
5. Editor: Can only view/edit the content created by ‘Author’s in their cities.
6. Verification: Can only view/edit the content created by the ‘Editor’s in their cities.
7. Author: When creates content, should have the options to:
* Save as draft
* Send to Editor
8. Editor: When edits content, should have the options to:
* Send back to Author
* Send to Verification
9. Verification: When edits content, should have the options to:
* Send back to the Editor
* Mark as Verified.

**Scenario**

An admin creates the following users:

Username|Role|City|Content titles written by the user
:--|:--|:--|:--
John|Author|New York|Test1, Test2, Test3
Sam|Author|New York|Test4, Test5, Test6
Kim|Author|Berlin|Test7, Test8, Test9
Adam|Editor|New York
Alex|Editor|Berlin
Stacey|Verification|New York
Anthony|Verification|Berlin

Based on the above scenario, the Authors below should be able to access only the titles they created; Additionally:

* Adam: Should be able to view/edit the titles: Test1 - Test6 (Since they were written by 2 Authors in his City.
* Alex: Should be able to view/edit the titles: Test7 - Test9 (Since they were written by Kim, which in his city)

The same applies for the Verification.

Finally, If Author sent the content to Editor, the Author should no longer be able to edit the content, until it’s sent back to him by the Editor.

/r/django
https://redd.it/6z1oj4

Good Django training resources for experienced developers in other languages?

I'm having a hard time finding django training resources geared towards people who already have experience with other languages / frameworks such as PHP/Symfony or Ruby. Does anyone have any recommendations?

Paid or free courses / books are would be fine... But bonus if something covers building apis with DRF...

/r/django
https://redd.it/6z1jzp

Slack CLI for productive developers

I just released v2.0.0 of my [slack-cli](https://pypi.org/project/slack-cli/) python package. Comments are welcome!

(also, this is my first ever reddit post \o/)

EDIT: missing link damn it

/r/Python
https://redd.it/6z1jt3

Trying to build a date based app

Hi guys,

I'm trying to build an app where I can consult all of my swimming sessions. Every time I go swimming I upload the data from the watch to a mariadb database, adding one column with the date of the session like 2017-09-09.

Now I'm trying to build a django app where I can see the sessions organized by date. Like /2017/ shows all the sessions of this year, /2017/sep/ shows this month sessions, and /2017/sep/09 the data for this session.

This is my urls.py

url(r'^(?P<year_slug>[0-9]{4})/$', views.by_year, name='by_year'),
url(r'^(?P<year_slug>[0-9]{4})/(?P<month_slug>[\w-]+)/$', views.by_month, name='by_month'),
url(r'^(?P<year_slug>[0-9]{4})/(?P<month_slug>[\w-]+)/(?P<day_slug>[\w-]+)/$', views.by_day, name='by_day'),

I already kind of made it, I added three ForeignKey to my sessions model, pointing to Year, Month, and Day. Then I added three column to the database and added the value for each one, like if it's in 2017 it will be a 1, if it's in 2018 it's gonna be a two, and so on for months and days.

I feel like this is far from optimal. Can't I do that by using the 2017-09-09 which is in the date column, instead of adding three tables to the database?

Or is there even a totally different way to achieve this? (I tried {Year,Month,Day}ArchiveView but I wasn't able to make my own queries (like to get the total distance for one month)

My second question is, even if I go that way, I'm able to display the total distance for august in 2017/08/ by using the month_slug, but how can I do that in /2017/ ? I mean I understand I can't use the month_slug, but since I have sessions classed by month using {% ifchanged %}, isn't it possible to display the total distance for each month ?


I would appreciate some help here, thanks in advance and sorry for the wall of text.

/r/django
https://redd.it/6z3qxs

Detailed Flask Web Development Series

Hey guys,

I’ve been working on building a really detailed course around the Flask framework to get many beginners started with web development with Python.

Course Page: https://www.thecodewolf.com/courses/python-flask-web-development/

Here are the first few videos of the series, I’ve also have written tutorials with the videos as well:

* Overview & Installation
* [Video](https://youtu.be/Ty2qAlDsAxc)
* [Blog Post](https://www.thecodewolf.com/introduction-to-python-flask-web-development-overview-of-flask/)
* Hello World & Flask Application Structure
* [Video](https://youtu.be/OrTWfZpv0i0)
* [Blog Post](https://www.thecodewolf.com/python-flask-web-development-hello-world-flask-application-structure/)
* Flask Templates, Jinja2 Tutorial, Bootstrap Integration, and Custom Error Pages
* [Video](https://youtu.be/0M74EGmqWIY)
* [Blog Post](https://www.thecodewolf.com/python-flask-web-development-flask-templates-and-flask-bootstrap-integration/)

The next few videos and guides will be coming out in the next few days/weeks, and I’ll be releasing new content on a regular basis.

**My goal is to create the best foundational web development course with the Flask framework to get as many people started with Flask as a stepping stone in web development with Python.**

If you guys enjoy the content, I will also be working on a detailed series like this with Django as well.

Here are some of the following videos that will be coming up with the series:

* Web Forms with Flask
* Database Integrations with Flask

Then I will be working on content that will actually have you build a complete blog application with users, blog posts, and all sorts of other really cool stuff.

With the current content so far, I would love to hear some feedback as well.

~ CW

/r/Python
https://redd.it/6z5jkx

I wrote a library that automatically formats help messages for your program and integrates with Sphinx. Feedback is greatly appreciated :-)
https://github.com/lostatc/linotype

/r/Python
https://redd.it/6z3wfz

Why create more than one url files?

So i'd like to began by saying i'm a total noob in django and web development. I started taking the trydjango1.11 series available on youtube. It's well taught and explained.

In the series, they only configure the urls in the root folder of our projec where the main url file is located. The other day i was browsing other people's tutorials and django's documents and i noticed that they made two url files. The one which was already available in the project folder, and the other they made in their app's folder.

I don't understand the point of this. The series i'm watching works perfectly with only one url file which is in the root of the project's folder.

As english is not my first language, i hope you could understand my question. Any sort of help is appreciated :)

/r/djangolearning
https://redd.it/6z0kdd