Generate misspelling words...

typo.py

#!/usr/bin/python

import sys
import random

def misspell(s):
    # word and punctation
    (w, p) = (s, '') if s[-1] not in [',', '.', ';', ':'] else (s[:-1], s[-1])
    if len(w) <= 3:
        return s

    mid = [x for x in w[1:-1]]
    random.shuffle(mid)
    return w[0] + ''.join(mid) + w[-1] + p

def main():
    if len(sys.argv) < 2:
        print "Usage: type 'the sentence you want to misspelling'"
        print
        return

    input_str = sys.argv[1]
    output_str = ' '.join([ misspell(x) for x in input_str.split() ])
    print
    print "[input]:  " + input_str
    print "[output]: " + output_str
    print

if __name__ == "__main__":
    main()