A simple timestables generator. Saw an exercise online and thought I'd give it a go. One improvement you could make is to convert the stored values to strings so you could pad smaller values up so everything nicely aligns.

timestables.py

def timestables(size):
    table = [[0 for i in range(size)] for i in range(size)]
    for j in range(size):
        for i in range(size):
            table[j][i] = (i+1)*(j+1)
            table[i][j] = (i+1)*(j+1)
    for line in table:
        print line

timestables(15)