Jack Little wrote:
> Is there a way in python to do matrix multiplication and its inverse? No
> external modules is preferred, but it is ok.
Use numpy:
>>> import numpy, numpy.linalg
>>> a = numpy.array([[1, 2], [3, 4]])
>>> b = numpy.linalg.inv(a)
>>> b
array([[-2. , 1. ],
[ 1.5, -0.5]])
>>> numpy.dot(a, b)
array([[ 1., 0.],
[ 0., 1.]])