Clarification on DRF Serializers

I'm still not a 100% on how serializers work. I get that they're used for serializing and de-serializing but WHY are they used for creating and updating models too?! Doesn't this break the Single Responsibility Principle? Anyway, my questions are:

​

1. When we "exclude" a field what does it actually mean?
1. Is it not serialized and de-serialized only or does it mean that it won't be saved when we call serializer.save()? The reason why I ask this is because this field is something I need to be setting in the backend python code instead of being passed in from the user.
2. Does read-only field mean they are passed back to clients but not required when getting data from clients / in api calls?

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

Automatically create models at startup in multiple models.py in flask

https://github.com/CodeHostedHere/channel\_response\_bot/blob/master/slash\_commands/models.py

Please see the repo above. I've tried adding db.create_all() but it seems my models.py is being ignored. I'd like the app to startup and create any missing tables in any module I make

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

Stripe As Payment Gateway

Dear community,

I’m building a SaaS solution.
I’m studying the payment integration and found stripe interesting as a payment gateway.

Any feedbacks from you about this company/solution ?

I read many negative feedbacks on stripe subreddit but also on trustpilot.

/r/django
https://redd.it/xbx8ys

Templating for HTMX out-of-band swaps

I'm trying out HTMX in a new project, and really enjoying it so far. One thing I'm struggling with though is how HTMX handles updating content in other areas of the page.

With the hx-swap-oob attribute, the default behaviour is to include the other updated areas of the page in the same template partial.

The problem this leads to is having multiple copies of the same snippet, or different snippets returned than the original partial being displayed.

I'm aware of the approach of using django-render-block as shown in the recent BugBytes video. Does anyone else have another approach they prefer for out-of-band swaps?

Thanks!

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

Monday Daily Thread: Project ideas!

Comment any project ideas beginner or advanced in this thread for others to give a try! If you complete one make sure to reply to the comment with how you found it and attach some source code! If you're looking for project ideas, you might be interested in checking out Al Sweigart's, "The Big Book of Small Python Projects" which provides a list of projects and the code to make them work.

/r/Python
https://redd.it/xbxs9l

D Simple Questions Thread

Please post your questions here instead of creating a new thread. Encourage others who create new posts for questions to post here instead!

Thread will stay alive until next one so keep posting after the date in the title.

Thanks to everyone for answering questions in the previous thread!

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

create points accordingly to the curvature of the curve

Hello guys,

I have a scipy interpolate curve object and I would like to get a list of points on the curve wich have their distance depending on the curvature of the scipy curve.

I'm not sure I've made it clear so don't hesitate to ask me details.
Cheers

/r/IPython
https://redd.it/xclpk8

How to iterate through a a csv file in views.py?

Hello, I'm new to django. I cant find an answer to the following question anywhere.

I want to use the data of a csv file and make sentences out of it. Does anyone know of a good tutorial on how to do it?

​

This is close https://stackoverflow.com/questions/39003732/display-django-pandas-dataframe-in-a-django-template

/r/djangolearning
https://redd.it/xcjzs7

Level up your Pandas skills with query() and eval()
https://medium.com/@dreamferus/level-up-your-pandas-skills-with-query-and-eval-f065951162df

/r/IPython
https://redd.it/x4y7uu

Tuesday Daily Thread: Advanced questions

Have some burning questions on advanced Python topics? Use this thread to ask more advanced questions related to Python.

If your question is a beginner question we hold a beginner Daily Thread tomorrow (Wednesday) where you can ask any question! We may remove questions here and ask you to resubmit tomorrow.

This thread may be fairly low volume in replies, if you don't receive a response we recommend looking at r/LearnPython or joining the Python Discord server at https://discord.gg/python where you stand a better chance of receiving a response.

/r/Python
https://redd.it/xcsa6v

Pergunta: alguém conhece um Framework CSS para impressão?

Eu tenho gerado alguns relatórios com R e com Python em pdf. Para isso estou usando LaTeX, mas tem sido bastante difícil fazer algumas coisas nele.
Uma alternativa seria gerar em html e converter para pdf.
Então eu procuro um Framework CSS focado em impressão.
Não é necessário ter suporte a paginação ou features avançadas, só uma tipografia já seria o bastante.

/r/IPython
https://redd.it/x4tyj2

I'm Al Sweigart, author of Automate the Boring Stuff with Python. I'm currently doing an AMA about my latest book on recursive algorithms.

Please post question to the AMA thread rather than on this post. Thank you!

https://www.reddit.com/r/IAmA/comments/xcp6jv/im_al_sweigart_author_of_several_free_programming/

/r/Python
https://redd.it/xcr4tt

Optimization of the Django count() query.

Hey!
Anyone can help me on the django count query thing.


for large databases, the count query takes so much time, leading to the user's waiting.
total_count = catalog_items.count()
Like this query is alone taking 8858ms.


Does anyone help me to optimize this query in the database or at any level?
It will be a great help.

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

Recruiter asking how much experience is development vs. scripting

Most of my python experience is in scripting and automation, about 5+ years. I am self taught, on the job learner. I have a recruiter asking me to clarify how much of my experience is in pure development.

I have about a year working on a django app, which I guess that would qualify. I assume they would want to grill me on concepts in the interview I might not know well. Such as data structures/algorithms/etc. Or maybe solve a problem on the spot.

I do study some off the clock. If I do get an interview, what would be the best way to prep?

/r/Python
https://redd.it/xd8cu3

Send WhatsApp Notifications Using Django

I need help finding a free third party service to send WhatsApp notification messages using Django.

/r/django
https://redd.it/xdc3cx

Securing a Python CLI application with Auth0

Build Python CLI applications secured by using the device authorization flow with Auth0.

Read more…

/r/Python
https://redd.it/xda30d

Best Practice for multi-framework project

Say there's a project with the following schema ->

|-backend (Django)
|-frontend (React)
|-external (custom data mining scripts in python)

Some of the rules I set for the project were:
- external mines relevant data from the internet and feeds them into my local postgresql db
- All creation and altering of DB schema would be done through Django (backend)
- external sanitizes the data; backend sorts, analyzes etc data
- DRF is used to send data from backend to frontend

It's come to the point where I really want to start utilizing some Django functionality (models) in my external package.

I was going to research exactly all I'd have to do to simply use python import functionality to bring the models into the module and then it hit me that I could also use the DRF API in external where external could C, U and D the data and frontend could only R it

In some of you folks' experience what is the best way to do this? Import the models or use the API?

/r/djangolearning
https://redd.it/xdj5se

Near-Earth Objects - Project Part 7: The Opposition Effect

Hey Pythonistas,

video #7 of my space science related Project "Near-Earth Objects" is out! Last time, I showed you how one can compute the brightness of an asteroid using an empirically derived formula called the "H-G-function". This time I want to show you some strange behaviour of these stony worlds: The Opposition Effect.

What's that?

Well, the brightness of asteroids depends on miscellaneous parameters and geometric considerations, like e.g., the distance between the Sun and the asteroid, as well as the asteroid and the observer (us, the Earth). Additionally, the phase angle between the asteroid - Sun - Earth must be taken into account, too!

For example, a phase angle of 0 degrees corresponds to an imaginary straight line, where the Sun - Earth and asteroid lay on it.

For very small phase angles, the brightness of asteroids "surges" exponentially, but only for a veeery short time: The Opposition Effect.

And in this tutorial I'd like to show you this effect using the corresponding equations.

GitHub Link: https://github.com/ThomasAlbin/Astroniz-YT-Tutorials/blob/main/%5BProject%5D-Near-Earth-Objects/06\_NEO\_Apparent\_Magnitude\_%232.ipynb

YouTube Link: https://www.youtube.com/watch?v=1HgcxmSStFk

If you would like to know more about the scientific background of this effect, I also created a small science video about it: https://www.youtube.com/watch?v=slVkkp4rE7I

I am not a professional YouTuber, I know. I just like to use YouTube to

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

Rate Limiting Celery Tasks
https://appliku.com/post/rate-limiting-celery-tasks

/r/django
https://redd.it/xddps9

how to add line in plot

How can i add a average line showing gender 0.0 earns more?

my current code:

df.plot(x='gender',y='salary', kind='scatter')
y_avg = [np.mean(gender)] * len(gender)

​

https://preview.redd.it/pdy7vp1icmf91.png?width=760&format=png&auto=webp&s=d16ced015651748402f47e2f77a0e63d1d44c370

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