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pymatrix (GitHUb) is a lightweight library for basic linear algebra operations.

Here is an example, for a linear system as follows:

It can be solved like:

from pymatrix import *

A = matrix([
    [ 3.0,  2.0, -1.0],
    [ 2.0, -2.0,  4.0],
    [-1.0, .5, -1.0],
])

b = Matrix.FromString('''
     1
    -2
     0
''')

print(A.inverse()*b)

There are some differences ways to instantiate a matrix. The matrix elements are iterable and indexable. A few dozens of matrix operations and functions are available. It’s written for both Python 2 and 3.

By the way, recently there is a PEP 465 about dedicated @ matrix operattor, you might want to check that out.