Why doesn't my code work?

Question

I'm writing code to write a string in a backwards alphabet (i.e. cat -> xzg) and this is my code:

string = input()

dict = {
'a': 'z',
'b': 'y',
'c': 'x',
'd': 'w',
'e': 'v',
'f': 'u',
'g': 't',
'h': 's',
'i': 'r',
'j': 'q',
'k': 'p',
'l': 'o',
'm': 'n',
'n': 'm',
'o': 'l',
'p': 'k',
'q': 'j',
'r': 'i',
's': 'h',
't': 'g',
'u': 'f',
'v': 'e',
'w': 'd',
'x': 'c',
'y': 'b',
'z': 'a'
}

string.lower()

for x in string:
x = dict[x]

print(string)

Why does it just spit out the input, and how do I fix it?

Answer 1

https://code.sololearn.com/c2hqp1KvtrKE/?ref=app
This is correct way

Answer 2

Your solution doesn’t work for words like ‘huzzah’

Answer 3

string = string.replace(x,dict[x])

put this inside the loop