That's why Instagram engineers have developed 'strict modules' for Python. "One reasonable take might be that we're stretching Python beyond what it was intended for.

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.

More deprecated Python modules These modules are far less likely to be in use in any programs you’re writing or maintaining, but it’s worth knowing they have been deprecated.