decryption

[kholood]

hello
I am trying to make python decrypt a long string into the message

but it seems to be something wrong with my program


I have not done any programming before
and I hope that you help me to understand this one perfectly
here is the quistion
Test 1 - simple phrase, standard shift
>>> decrypt('wkh txlfn eurzq ira mxpsv ryhu wkh odcb grj', 3)
'the quick brown fox jumps over the lazy dog'


and here what I have done so far

def decrypt(ciphertext, shift):
    """
    Decrypts some ciphertext encrypted with the Caesar cipher.  Uses the
    shift to do the decryption.
    """
 
    newtxt = 'wkh txlfn eurzq ira mxpsv ryhu wkh odcb grj'
    for i in range(len (newtxt)):
        if newtxt[i]== ciphertext:
            return newtxt [(i - shift )%len (newtxt)]
    return newtxt

[bvdet]

Your code is not doing anything. newtxt is never equal to ciphertext. The shift can be accomplished using the built-in functions ord() and chr(). Strings are immutable, so you will have to build a new string. Here's a hint:

>>> s = "abcdef"
>>> shift=3
>>> "".join([chr(ord(letter)+shift) for letter in s])
'defghi'
>>>