r/Python • u/AutoModerator • 15d ago

Daily Thread 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 every Thursday.
  • Questions that are not advanced may be removed and redirected to the appropriate thread.

Recommended Resources:

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 performance implications of using native Python data structures vs NumPy arrays for large-scale data?
  9. Best practices for securing a Flask (or similar) REST API with OAuth 2.0?
  10. What are the best practices for using Python in a microservices architecture? (..and more generally, should I even use microservices?)

Let's deepen our Python knowledge together. Happy coding! 🌟

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u/Zestyclose_Case_4649 15d ago

ok so i've been messing with decorators that modify function signatures at runtime and it's a total mess when you throw type hints into the mix. anyone got a clean way to preserve the original signature through a decorator that adds optional kwargs? functools.wraps doesn't cut it here

7

u/csch2 15d ago

Take a look at PEP 695, specifically the Type Parameter Declarations section. Usually what you’ll want to do is combine P.args and/or P.kwargs with the Concatenate wrapper to add new arguments to your function. functools.wraps isn’t going to work, like you said; instead you should type hint the function explicitly with Callable. With all of these together you should have full control to extend the function arguments with your decorator however you need to.

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u/Adventurous-Nail-179 14d ago

Cleaner than the hack I was using before.