python - Find all upper, lower and mixed case combinations of a string

Question

I want to write a program that would take a string, let's say "Fox", then it would display:

fox, Fox, fOx, foX, FOx, FoX, fOX, FOX

My code so far:

string = raw_input("Enter String: ")
length = len(string)
for i in range(0, length):
    for j in range(0, length):
        if i == j:
            x = string.replace(string[i], string[i].upper())
            print x

Output so far:

Enter String: fox
Fox
fOx
foX
>>> 

Answer 1

import itertools

s = 'Fox'
map(''.join, itertools.product(*zip(s.upper(), s.lower())))
>>> ['FOX', 'FOx', 'FoX', 'Fox', 'fOX', 'fOx', 'foX', 'fox']