A word scrambler script that keeps the first and the last letter in each word intact, and shuffles the letters in the middle. A person can often read the scrambled words just fine without realizing it.

word-scrambler.py

from sys import argv
from random import shuffle

def scrambleWord(w):
        i = len(w) - 1
        # If it's a zero-length string, return it right away.
        if i < 0:
                return w
        else:
                # Handle non-alphabetical characters after the word/
                while not w[i].isalpha() and i >= 0:
                        i -= 1

        # If the word itself is 3 bytes or less, don't bother.
        if i < 3:
                return w

        # Scramble & return
        gutter = list( w[1:i] )
        shuffle(gutter)

        return w[0] + "".join(gutter) + w[i:]

def scrambleSentance(s):
        # Split ever word by space and pass them all through scrambleWord().
        return " ".join( map( scrambleWord, s.split(' ') ) )


if len(argv) > 1:
        print scrambleSentance(argv[1])
else:
        print "Syntax: %s <sentence>"