Generating Combinations in python

Question

I am not sure how to go about this in Python, if its even possible. What I need to do is create an array (or a matrix, or vector?) from 3 separate arrays. Each array as 4

Answer 1

The simplest way:

for i in Class1:
    for j in Class2:
        for k in Class3:
            print (i,j,k)

Answer 2

What you want is called a Cartesian product:

import itertools

iterables = [ [1,2,3,4], [88,99], ['a','b'] ]

for t in itertools.product(*iterables):
    print t

Answer 3

Check the Python itertools standard module:

itertools.combinations(iterable, r)

Return r length subsequences of elements from the input iterable.