How to make a windowed signal band pass filter in Python?

Question

Python

Hello.
There is some complex signal. It has a lot of frequencies (from 0 to 100, for example), this can be obtained using the Fourier transform. But it is required to leave only certain frequencies (for example, from 10 to 50) and output the signal back only with these certain frequencies.
I recently learned about the window bandpass filter . Don't know how to make it in Python ?