How do I replace a character in a list with a character in a different list in python

Question

So I am trying to replace a character in a string with the next letter of the alphabet using strings. I have got the input converted but I don't know what to do from here? Here is my code:

alphabet =['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
wordlist = []
inputword = input("Please enter a string")
wordlist = list(inputword)
for i in range(len(inputword)):

print (wordlist)

I am trying to get it so that if I inputted "Hello World" , it will return "Ifmmp xpsme"

It doesn't have to return the exact case (upper case letters can be returned as lower case

Perhaps, example of input and desired output would make things clear — Enthusiast Martin, Jul 17 '18 at 09:30
Apart from the fact that this question does not show any effort at all, a functional duplicate of https://stackoverflow.com/q/1538935/2564301 — Jongware, Jul 17 '18 at 09:42

seralouk · Answer 1 · 2018-07-17T09:41:10.140

0

If I understood correctly, you want to replace a character that is given by a user with the next character of the alphabet.

Assuming that z should become a use this:

For single character inputs (e.g. 'a') use this:

alphabet =['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
wordlist = []
inputword = input("Please enter a string:")
wordlist = list(inputword)

if wordlist[0] == 'z':
    #print('Sorry, I do not know what to do for this case')
    idx = 0
    new_word = alphabet[idx]
    print(new_word)

else:
    idx = alphabet.index(wordlist[0])
    new_word = alphabet[idx +1]
    print(new_word)

For whole string inputs (e.g. 'hello world') use this:

def next_letter(st):
    index = 0
    new_word = ""
    alphapet = "abcdefghijklmnopqrstuvwxyzacd"

    for i in st.lower():
        if i.islower(): #check if i s letter
            index = alphapet.index(i) + 1 #get the index of the following letter
            new_word += alphapet[index]    
        else: #if not letter
            new_word += i    
    return new_word

USER_INPUT = input('enter string:')

next_letter(USER_INPUT)

Example:

USER_INPUT= 'hello world'

print(next_letter(USER_INPUT))
'ifmmp xpsme'

edited Jul 17 '18 at 09:41

answered Jul 17 '18 at 09:21

seralouk

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What about `'z'` in the input? – user2390182 Jul 17 '18 at 09:22
see my answer. I commented this – seralouk Jul 17 '18 at 09:23
Ok so that works for 1 position, what am I supposed to do for the whole string? As I didn't want a single character, it should work for a sentence – Randex Grandma Jul 17 '18 at 09:26
oh. do you want to replace each character in a string with the next one ? so the input is a whole string and not a single character ? – seralouk Jul 17 '18 at 09:28
And for Z, could if wordlist[0] == 'z': new_word = 'a' – Randex Grandma Jul 17 '18 at 09:28
@RandexGrandma see my edit 1. for 'hello world' it works fine – seralouk Jul 17 '18 at 09:38

How do I replace a character in a list with a character in a different list in python

1 Answers1

For single character inputs (e.g. 'a') use this:

For whole string inputs (e.g. 'hello world') use this: