Deploying flask app with waitress and NSSM

I'm deploying a small internal Flask app for my organization, and I must run it on Windows due to a third-party dependency. Right now, I'm using Waitress as the WSGI server and NSSM to run it as a service.

Since this is for internal use only (private network, not exposed to the internet), do I really need a reverse proxy like Nginx or IIS? I know it's generally recommended for public-facing apps, but for an internal tool, are there any real downsides to just using Waitress directly?

/r/flask
https://redd.it/1irqa4j

I accidentally made an LMS... Now it's open-source 🤷‍♂️

So, I was just trying to learn Django, and somehow ended up building a full-blown Learning Management System adilmohak/django-lms. You know, as one does.

It's got all the usual stuff – courses, quizzes, student management, and even a dashboard because who doesn't love looking at colorful graphs pretending to be productive?

Anyway, it's open-source now because I figured someone out there might need it (or at least want to poke fun at my code). If you're curious, feel free to check it out or roast me in the comments.

Oh, and I moved it from my personal account to its own organizational account... thought it might make life easier for contributors.

/r/django
https://redd.it/1irq2dz

Tuesday Daily Thread: Advanced questions

# Weekly Wednesday Thread: Advanced Questions 🐍

Dive deep into Python with our Advanced Questions thread! This space is reserved for questions about more advanced Python topics, frameworks, and best practices.

## How it Works:

1. **Ask Away**: Post your advanced Python questions here.
2. **Expert Insights**: Get answers from experienced developers.
3. **Resource Pool**: Share or discover tutorials, articles, and tips.

## Guidelines:

* This thread is for **advanced questions only**. Beginner questions are welcome in our [Daily Beginner Thread](#daily-beginner-thread-link) every Thursday.
* Questions that are not advanced may be removed and redirected to the appropriate thread.

## Recommended Resources:

* If you don't receive a response, consider exploring r/LearnPython or join the [Python Discord Server](https://discord.gg/python) for quicker assistance.

## Example Questions:

1. **How can you implement a custom memory allocator in Python?**
2. **What are the best practices for optimizing Cython code for heavy numerical computations?**
3. **How do you set up a multi-threaded architecture using Python's Global Interpreter Lock (GIL)?**
4. **Can you explain the intricacies of metaclasses and how they influence object-oriented design in Python?**
5. **How would you go about implementing a distributed task queue using Celery and RabbitMQ?**
6. **What are some advanced use-cases for Python's decorators?**
7. **How can you achieve real-time data streaming in Python with WebSockets?**
8. **What are the

/r/Python
https://redd.it/1iryz2j

How can I use session data to track what registration pages were filled out?

Hello, I wanted to use session data to keep track of what pages were filled out in the registration sequence and which ones were not. Just in case the user leaves the page, and comes back, I want them to be able to log back in and start where they left off in the process. These are all html pages containing text fields. I have tried alot of different things but it always starts me back on the beginning page regardless of where I left off.

/r/django
https://redd.it/1is4hjw

Video game review site

Hey so I am learning flask and starting to do a project which is kinda like a video game review site, which involves sql where the user can provide reviews and stuff, are there any open source codes that I can use as a guideline for my project?

/r/flask
https://redd.it/1is8mxc

Fiask App with ultralytics

Hi, what hardware would i need for it to handle flask App, it would use 5 ultralytics yolo models, and I need for this hardwate to handle about 30-40 users


/r/flask
https://redd.it/1isadea

I created a Python Price Tracker

The link of the project is here.

What My Project Does

It automatically reads the price from certain shop links and returns the price to the user, notifying them of price changes automatically.

I am currently trying to buy a pc ($500 pc but still) and since I am saving and I am scared that the prices will be constantly changing I created a program that automatically updates an excel and sends me a message, through the telegram API of possible price changes.

It has the following features:

\- Five minute check of all products and prices.

\- Automatic message sending, along with easy to follow instructions to configure the telegram bot.

\- Automatic updating of the excel sheet

The only downside is that since I am web scraping some stores are still not available in the price_getter file.

It is just a side project but if anyone wants me to add a store to retrieve the prices from there I will keep on updating it for a while!

Target Audience

For this project I think people saving up for items in certain shops could use this project to track their price in real time.

The code uses webscraping, Telegram API, and google sheets API

You could just implement it as a module in

/r/Python
https://redd.it/1irye5t

We built a blockchain that lets you write smart contracts in NATIVE Python.

# What My Project Does

​ Hey everyone! We’ve been working on **Xian**, a blockchain where **you can write smart contracts natively in Python** instead of Solidity or Rust. This means Python developers can build decentralized applications (dApps) without learning new languages or dealing with complex virtual machines. ​ I just wrote a post showing [how to write and test a smart contract in Python](https://in.mt/how-to-write-and-test-a-smart-contract-in-python-on-the-xian-blockchain) on Xian. If you’ve ever been curious about blockchain but didn’t want to dive into Solidity, this might be for you. ​

# Target Audiences

* Python developers interested in Web3 or blockchain but don’t want to learn Solidity.
* People curious about how blockchain works under the hood.
* Developers looking for **an easier way to write smart contracts** without switching to a new language.

# Comparison (How It’s Different)

* **Solidity/Rust vs Python:** Unlike Ethereum, where you must write contracts in Solidity, Xian lets you write them in **pure Python** and deploy them **without extra conversion layers**.
* **Faster Prototyping:** Since Python is widely used, Xian makes it easier to prototype and deploy blockchain applications.
* **Simpler Developer Experience:** No need for specialized compilers or bytecode conversion—just **write Python, deploy, and execute**.

# Links

* **Guide:** [How to Write and Test a Smart Contract

/r/Python
https://redd.it/1iscge8

A drum machine and 16-step sequencer

# Background

I am posting a series of Python scripts that demonstrate using Supriya, a Python API for SuperCollider, in a dedicated subreddit. Supriya makes it possible to create synthesizers, sequencers, drum machines, and music, of course, using Python.

All demos are posted here: r/supriya\_python.

The code for all demos can be found in this GitHub repo.

These demos assume knowledge of the Python programming language. They do not teach how to program in Python. Therefore, an intermediate level of experience with Python is required.

# The demo

In the latest demo, I show how to create a drum machine with a 16-step sequencer. Much of the post is dedicated to discussing the various design-related decisions that must be made when creating a step sequencer. Please give the demo script a try and let me know what you think.

/r/Python
https://redd.it/1iscyp4

Greenlets in a post GIL world

I've been following the release of the optional disable GIL feature of Python 3.13 and wonder if it'll make any sense to use plain Python threads for CPU bound tasks?


I have a flask app on gunicorn with 1 CPU intensive task that sometimes squeezes out I/O traffic from the application. I used a greenlet for the CPU task but even so, adding yields all over the place complicated the code and still created holes where the greenlet simply didn't let go of the silicon.


I finally just launched a multiprocess for the task and while everyone is happy I had to make some architectural changes in the application to make data churned out in the CPU intensive process available to the base flask app.

So if I can instead turn off yet GIL and launch this CPU task as a thread will it work better than a greenlet that might not yield under certain load patterns?

/r/Python
https://redd.it/1is6amk

Efficient Python Programming: A Guide to Threads and Multiprocessing

🚀 Want to speed up your Python code? This video dives into threads vs. multiprocessing, explaining when to use each for maximum efficiency. Learn how to handle CPU-bound and I/O-bound tasks, avoid common pitfalls like the GIL, and boost performance with parallelism. Whether you're optimizing scripts or building scalable apps, this guide has you covered!

🔗 Watch here: https://www.youtube.com/watch?v=BfwQs1sEW7I&t=485s

💬 Got questions or tips? Drop them in the comments!

/r/Python
https://redd.it/1irl4ap

Django + Caddy in Docker Compose?

Does anyone have an example of a production ready docker compose for django with caddy as a reverse proxy ? an example of a compose file and a caddyfile would be so helpful :D

/r/django
https://redd.it/1isexe4

Startup

Hello. I’m building a web app using Django to offer telehealth services in my country. Any tips that could help will be greatly appreciated.

In the meantime, I’m hoping to get help with the FrontEnd since I’ve only learnt backend with a little css and JavaScript.

/r/django
https://redd.it/1isnz2w

Django deploy on DigitalOcean App launcher

Hi I am i am having problems, when I try to launch my app on DigitalOcean.


I keep getting Cookie “\_\_cf\_bm” has been rejected for invalid domain.

When I try to launch my app.

This this is my settings:


SESSION\_COOKIE\_DOMAIN\_DYNAMIC = \['oyster-app-xj275.ondigitalocean.app', '\*'\]

MIDDLEWARE = \[

"django.middleware.security.SecurityMiddleware",

'whitenoise.middleware.WhiteNoiseMiddleware',

"django.contrib.sessions.middleware.SessionMiddleware",

"django.middleware.common.CommonMiddleware",

"django.middleware.csrf.CsrfViewMiddleware",

"django.contrib.auth.middleware.AuthenticationMiddleware",

"django.contrib.messages.middleware.MessageMiddleware",

"django.middleware.clickjacking.XFrameOptionsMiddleware",

'cookie\_consent.middleware.CleanCookiesMiddleware'

\]

ALLOWED_HOSTS = ['XXXXX.ondigitalocean.app', '*']




And it does not render anything.

I dont understand if why it is not working.... It works fine locally....

/r/django
https://redd.it/1ism2ne

MicroPie 0.9.9.3 Released

This week I released version 0.9.9.3 of my (optionally) single file ASGI "ultra-micro" framework, MicroPie.

This release introduces many new things since the last time I announced a release on here about 4 weeks ago... We now have the ability to implement custom session backends like aioredis and motor using the SessionBackend class. We also have introduced middleware so you can hook into incoming requests. Check out the source code, a ton of examples and documentation on GitHub.

MicroPie's Key Features
- 🔄 Routing: Automatic mapping of URLs to functions with support for dynamic and query parameters.
- 🔒 Sessions: Simple, plugable, session management using cookies.
- 🎨 Templates: Jinja2, if installed, for rendering dynamic HTML pages.
- ⚙️ Middleware: Support for custom request middleware enabling functions like rate limiting, authentication, logging, and more.
- ✨ ASGI-Powered: Built w/ asynchronous support for modern web servers like Uvicorn and Daphne, enabling high concurrency.
- 🛠️ Lightweight Design: Minimal dependencies for faster development and deployment.
- ⚡ Blazing Fast: Checkout the benchmarks.

This is an alpha release. Please file issues/requests as you encounter them! Thank you!


/r/Python
https://redd.it/1iso1bl

Urgent help

Im trying to make a website using Flask. This website has a linked database with SQLlite. Im trying to make an attendance feature with the for the website. The website will be used to record people attending a club. Ideally I would like the user to be able to see a list of checkboxes and just be able to tick who has attended the meeting. Im struggling to work out how to get my user data (store in my database) into my html file to make the attendance register. Any help would be greatly appreciated

/r/flask
https://redd.it/1isks26

Issue with Deploying Heavy Flask App on AWS Lightsail Containers

Hi everyone,

I’ve built a Flask-based web app for backtesting and optimising trading strategies using ML. It’s quite CPU- and memory-intensive, as it loads large datasets, runs calculations, and outputs results.

My Docker setup looks like this:
🔹 App container (Flask)
🔹 Redis container (for caching & Celery tasks)
🔹 Celery container (for background task execution)
🔹 Nginx container (reverse proxy)

The app runs fine on a standard server, but I’ve struggled to deploy it using AWS Lightsail containers. The main issue is that the containers randomly shut down, and logs don’t provide any useful error messages. Even when I scale up resources (CPU/RAM), the issue persists.

I’d love to hear from anyone who has experienced similar issues or has suggestions on:

1. Debugging container shutdowns on Lightsail (how to get better logs?)
2. Optimising Docker deployments for memory-heavy apps
3. Alternative hosting solutions if Lightsail isn’t a good fit

Any insights would be super helpful! Thanks in advance. 🚀

Tech Stack: Python | Flask | Celery | Redis | Docker | Lightsail

/r/flask
https://redd.it/1isccnk

Wednesday Daily Thread: Beginner questions

# Weekly Thread: Beginner Questions 🐍

Welcome to our Beginner Questions thread! Whether you're new to Python or just looking to clarify some basics, this is the thread for you.

## How it Works:

1. Ask Anything: Feel free to ask any Python-related question. There are no bad questions here!
2. Community Support: Get answers and advice from the community.
3. Resource Sharing: Discover tutorials, articles, and beginner-friendly resources.

## Guidelines:

This thread is specifically for beginner questions. For more advanced queries, check out our [Advanced Questions Thread](#advanced-questions-thread-link).

## Recommended Resources:

If you don't receive a response, consider exploring r/LearnPython or join the Python Discord Server for quicker assistance.

## Example Questions:

1. What is the difference between a list and a tuple?
2. How do I read a CSV file in Python?
3. What are Python decorators and how do I use them?
4. How do I install a Python package using pip?
5. What is a virtual environment and why should I use one?

Let's help each other learn Python! 🌟

/r/Python
https://redd.it/1isrcry

Is UV package manager taking over?

Hi!
I am a devops engineer and notice developers talking about uv package manager. I used it today for the first time and loved it. It seems like everyone is talking to agrees. Does anyone have and cons for us package manager?

/r/Python
https://redd.it/1isv37n

New version FastAPI Guard + Redis - A FastAPI extension to secure your APIs

Original post

I'm happy to tell you I've just released a new version (1.0.0) of FastAPI Guard - this time with Redis Integration and some other upgrades :)

Take a look at the docs & repo:

Documentation: rennf93.github.io/fastapi-guard/

GitHub repo: github.com/rennf93/fastapi-guard

# Important note

The new version allows you to persist ip bans, rate limits, and more, across workers of a single application and/or other applications. Now you can have a single source of truth thanks to this integration of Redis into FastAPI Guard.

If you've already came across or read the previous post, you might want to skip the following text as it's mostly the same.

---

What is it?

FastAPI Guard is a security middleware for FastAPI that provides:

- Redis Integration (new!)
- IP whitelisting/blacklisting
- Rate limiting & automatic IP banning
- Penetration attempt detection
- Cloud provider IP blocking
- IP geolocation via IPInfo.io
- Custom security logging
- CORS configuration helpers

It's licensed under MIT and integrates seamlessly with FastAPI applications.

Comparison to alternatives:
- fastapi-security: Focuses more on authentication, while FastAPI Guard provides broader network-layer protection
- slowapi: Handles rate limiting but lacks IP analysis/geolocation features
- fastapi-limiter: Pure rate limiting without security features
- fastapi-auth: Authentication-focused without IP management

Key differentiators:
- Combines multiple security layers in single middleware
- Automatic IP banning based on suspicious activity
- Built-in cloud

/r/Python
https://redd.it/1isqf8y

open source code for translating Chinese in the image into Korean?

I found the function to remove text from an image through a web search. With the lama cleaner, you can use the image inpainting function reliably and quickly, but I'm asking because I want to add additional features. You can translate text and type the text directly, or you can automatically cover the image with a translated text just like the texture of the background. And I wish I could edit the text myself. Please give me some sources or address that I can recommend.

# 🔍 Image Text Editing and Translation Query

I discovered an image text removal function through web searching ✨. While the Lama Cleaner's image inpainting function works reliably and quickly, I'm looking to add some additional features 🛠️:

1. 🌐 Text translation capabilities:
📝 Direct text input functionality
🎨 Automatic background-matching text overlay with translations
2. ✏️ Custom text editing features:
🔧 Ability to manually edit and customize text
🎯 Personal text modification options

I would appreciate recommendations for relevant resources or references that could help implement these features 📚.

/r/flask
https://redd.it/1iswknk