SciPy
is an extensive library for applied mathematics and scientific computation. The following is the complete list of all the modules available in the library:
Module 
Functionality 


Clustering algorithms 

Physical and mathematical constants 

Fast Fourier Transform 

Integration and ordinary differential equations 

Interpolation and splines 

Input and output 

Linear algebra 

Image processing 

Orthogonal distance regression 

Optimization and rootfinding 

Signal processing 

Sparse matrices 

Spatial data structures 

Special functions 

Statistical distributions 

C/C++ integration 
The standard way to import SciPy
modules in scripts is using the following command line:
from scipy import signal
Then, individual functions can be called with the usual module reference syntax, as follows:
signal.correlate(…)...