Take character base difference

diff.py

#!/usr/bin/env python

import os

def diff(file1, file2):
    with open(file1, 'r') as f1:
        file1_content = f1.read()
    with open(file2, 'r') as f2:
        file2_content = f2.read()

    zipped = zip(file1_content, file2_content)
    print file1_content
    for i, (a, b) in enumerate(zipped):
        if a != b:
            print i, a, b


if __name__ == "__main__":
    ret = diff('./a', './b')