Managing sound properties in python

I am looking for a lib that helps me use many properties of sound.

I mean, I need something to get each frequency of sounds, to get the length and width of sound waves, to get a peak and a trough (by the measurement method) of sounds.

I need something that allows me to manipulate and measure sound waves in some way as close as possible, this is what I need more for scientific research than for application.

It's hard to find something like that. If you could help me with some links or something else, I would really help me out.

If you have something even in other languages, this can help me.

I will keep this question up to date as I find answers.

Thanks in advance.