Encryption and Decryption from a dictionary.

[Netwatcher]

well, i started messing around with dictionaries, yet, most of the pages i found about them always talk about getting only one word out of it and turning it vice versa, i've been playing with that code for a few hours:

#dics
Encryption={',':'hy{;','  ':'h4x0r2','':'zomg','?':'bko','a':'ika','b':'d0v','c':'ino', 'd':'maw', 'e':'aon', 'f':'que', 'g':'kip', 'h':'an[', 'i':'bf}', 'j':'ana&', 'k':'%d#', 'l':'d^f', 'm':'[d:w]', 'n':'ko[p', 'o':'{par:', 'p':'nt|;', 'q':'bz&$', 'r':'le{}', 's':'ak+', 't':'joq%', 'u':'f%(', 'v':'@!', 'w':'hg^*', 'x':'yu#', 'y':'fy%s', 'z':'mos@'}
Decryption=dict(zip(Encryption.values(), Encryption.keys()))

#functions#



# f1 enc #
def encrypt(x):
    try:
        #open spot for output#
        lol=""
        ##
        for letter in x:
            lol += Encryption[letter]
        print lol
    except KeyError:
            print 'These keys are not in the dictionary!'
        

# f2 dec #
def decrypt(y):
    try:
        lol=""
        for mail in y:
            lol += Decryption[mail]
        print lol
    except KeyError:
        print 'These keys are not in the dictionary!'

#men#
def menu():
    while 1:
        t=raw_input('Do you want to Encrypt or to Decrypt?[e,d] ').lower()
#case 1#
#Enc#
        while t=='e':
            try:
                print 'Enter Text below'
                x=raw_input('').lower()
                if len(x)<10:
                    print 'Print only long sentences' 

                else:
                    encrypt(x)
            except KeyError:
                print 'These keys are not in the dictionary!'
#case 2#
#Dec#
        while t=='d':
            try:
                print 'Enter Text below'
                y=raw_input('').lower()
                decrypt(y)
            except KeyError:
                print 'These keys are not in the dictionary!'
#b2men#
menu()

trying to get an output from the reversed dictionary is just not working, keeps giving me KeyErrors, even i enter only 1 word that is IN the dictionary...
maybe it's because didn't use conventional letters, but still, how do i decrypt?
plz help
#Note: the Encryption works perfectly, the Decryption Doesn't.
I'm using python 2.5 (python 3 is weird O|o)

[bvdet]

You are iterating on the string in decrypt(). That means you are considering only one letter at a time. Try this instead:

def decrypt(y):
    for key in Decryption:
        if key in y:
            while True:
                try:
                    i = y.index(key)
                    y = y[:i]+Decryption[key]+y[i+len(key):]
                except:
                    break
    return y

Example:

>>> s = encrypt('temple of doom')
>>> s
'joq%aon[d:w]nt|;d^faonh4x0r2{par:queh4x0r2maw{par:{par:[d:w]'
>>> decrypt(s)
'temple of doom'
>>>

[Netwatcher]

Oh, so this is how it's done...
the return is bugging it =/ changed it to print

[bvdet]

Oh, so this is how it's done...
the return is bugging it =/ changed it to print

There probably is a better way to do it. :)

I generally prefer to return an object from a function then format the output as required. Using an IDE makes testing code much easier. In your case:

s = encrypt('temple of doom')
print s
print decrypt(s)

[Netwatcher]

i need to decrypt binary, which example will work in that case?
is there a shortcut to create a Bin dictionary?

[Netwatcher]

i need to decrypt binary, which example will work in that case?
is there a shortcut to create a Bin dictionary?

Oh never-mind, i got it working:D,
now i just need to enter all the uppercase letters and symbols into the dictionary :p