pyaudioop.py def ratecv doesn't return something

[el07694]

Hello i am trying to implement to equillevant to pydub in C++ (cppdub library)!

I notice that in this file there is a method ratecv that doesn't return something.

Is this method miss-defined?

Anyway i think that pyaudioop.py is not used anywhere in the project but i decided to implement it.