Simple Caesar Cipher Help

[as1221]

Hello all,

I would like some expert python help. I'm very new to Python and I'm trying to create a simple caesar but it isn't working. It's stuck on the selection screen and it won't go any further.

def decrypt():
    a=raw_input("Give me the word to decrypt:")
    number=input("What was it shifted by?")
    b=list(a)
    str(b)
    c=[ord(x)for x in(b)]
    d=[]
    for i in c:
        d.append(i-number)
    e=[chr(i) for i in (d)]
    e="".join(e)
    print ("Decryption Successful, your word is ",e,"!")

def encrypt():
    a=raw_input("Give me a word:")
    number=input("Give me a number:")
    b=list(a)
    str(b)
    c=[ord(x)for x in(b)]
    d=[]
    for i in c:
        d.append(i+number)
    e=[chr(i) for i in (d)]
    e="".join(e)
    print ("Your Caesar shifted result (ascii code) is",e,"!")
    print ("Your key is ",number," remember that!")

def menu():    
    print ("\n\n\nWelcome to the Caesar Shifter.")
    print ("What would you like to do?")
    print ("Option 1:Encrypt Word")
    print ("Option 2:Decrypt Word")
    print ("If you would like to quit, press 0.")
    choice=input("Pick your selection: ")
    if choice==1:
        run=encrypt()
        run
        menu()
    elif choice==2:
        derun=decrypt()
        derun
        menu()
    elif choice==0:
        quit
    else:
        print ("That is not a correct selection, please pick either 1, or 2.")

menu()