crypto program in python.

[khudo.anastasia at gmail.com]

On Friday, March 8, 2013 2:07:55 PM UTC-5, Neil Cerutti wrote:
> On 2013-03-08, khudo.anastasia at gmail.com <khudo.anastasia at gmail.com> wrote:
> 
> > Hi every every body,
> 
> > Today I have to submit my assignment for Computer Science, And
> 
> > I am absolutely stuck in writing the code. Please help me in
> 
> > soon possible.
> 
> >
> 
> > The main idea of the program is encode and decode the text.
> 
> > that wot the instructor gave us so far.
> 
> >
> 
> > Sample Run
> 
> >
> 
> > Here's a sample run of the basic program in action.
> 
> >
> 
> >   SECRET DECODER MENU
> 
> >   
> 
> >   0) Quit
> 
> >   1) Encode
> 
> >   2) Decode
> 
> >   
> 
> > What do you want to do? 1
> 
> > text to be encoded: python rocks
> 
> > AQULEWKEMNJ
> 
> >
> 
> >   
> 
> >   SECRET DECODER MENU
> 
> >   
> 
> >   0) Quit
> 
> >   1) Encode
> 
> >   2) Decode
> 
> >   
> 
> > What do you want to do? 2
> 
> > code to be decyphered: AQULEWKEMNJ
> 
> > PYTHONROCKS
> 
> >
> 
> >   
> 
> >   SECRET DECODER MENU
> 
> >   
> 
> >   0) Quit
> 
> >   1) Encode
> 
> >   2) Decode
> 
> >   
> 
> > What do you want to do? 0
> 
> > Thanks for doing secret spy stuff with me.
> 
> > -----------------------------------
> 
> > and
> 
> >
> 
> >
> 
> > 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 am confused about menu and the str function if you can help
> 
> > me with this code it will be awesome thank you!!!
> 
> 
> 
> I believe your instructor intends you to start with the skeleton
> 
> of the program provided above. Complete it by writing the missing
> 
> functions: menu, decode, and encode.
> 
> 
> 
> -- 
> 
> Neil Cerutti

that is where I confused, I am not sure how to do it, I started but nothing works. And the tutorials at the internet not helpful. If you could write me the code for the decode function, that would be awesome, and other i can do by myself.

thanks