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From: John Gordon <gordon@panix.com>
Newsgroups: comp.lang.python
Subject: Re: String manipulation in python..NEED HELP!!!!
Date: Mon, 10 Dec 2012 22:59:05 +0000 (UTC)
Organization: PANIX Public Access Internet and UNIX, NYC
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In <d6779e35-32b8-417a-abf9-72454573bf56@googlegroups.com> qbailey@ihets.org writes:

> """ crypto.py
>     Implements a simple substitution cypher
> """

> alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
> key =   "XPMGTDHLYONZBWEARKJUFSCIQV"

> def main():
>   keepGoing = True
>   while keepGoing:
>     response = menu()
>     if response == "1":
>       plain = raw_input("text to be encoded: ")
>       print encode(plain)
>     elif response == "2":
>       coded = raw_input("code to be decyphered: ")
>       print decode(coded)
>     elif response == "0":
>       print "Thanks for doing secret spy stuff with me."
>       keepGoing = False
>     else:
>       print "I don't know what you want to do..."

> i really need help on how to encrypt it im not sure how to go about doing
> that please help.

def encode(plain):
   '''Return a substituted version of the plain text.'''

   encoded = ''

   for ch in plain:
      encoded += key[alpha.index(ch)]

   return encoded

-- 
John Gordon                   A is for Amy, who fell down the stairs
gordon@panix.com              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"