Snippets: Creating a matrix in python

There's two easy ways to do this:

Looping:

def matrix(rownumber,columnumber):
   matrix = []
   for i in range(rownumber):
       a = [0]*columnumber
       matrix.append(a)
   return matrix

List comprehensions:

def matrix(rownumber, columnumber):
    return [[0]*columnumber for x in range(rownumber)]