turn inverse in numpy code example

Example 1: inverse matrix numpy

#You can either use the included inv fucntion
M_inverse = numpy.linalg.inv(M)

#Or use the exponent notation, which is also understood by numpy
M_inverse = M**(-1)

Example 2: numpy function for calculation inverse of a matrix

# python3 inversion of matrix x
inverse = numpy.linalg.inv(x)