For a long time, Cython, and C modules for Python generally, were a way to sidestep the GIL, the global interpreter lock. C code that doesn’t call into the CPython runtime isn’t constrained by ...

Cython generates the second kind of module: C libraries that talk to Python’s internals, and that can be bundled with existing Python code. Cython code looks a lot like Python code, by design.

This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!

Devs unknowingly use “malicious” modules snuck into official Python repository Code packages available in PyPI contained modified installation scripts.