Coded correspondence: string out of index error WHY!?

Hello
So on task 1 i’m already confused
In summary - we have to decode the message, it’s an offset of 10 from the usual alphabet.
So I wrong the first bit of code to create the “offset” list, which all runs fine and is stored as a list in coded_alphabet.

My approach is
For every letter in the coded message, go through the coded_alphabet, find the matching character, then add the character from the normal alphabet at the same index to the decoded_message list.
I am getting an error
File “script.py”, line 30, in
if letter == code[i]:
IndexError: string index out of range

I thought that using the while loop would stop that? I dont know why the index would go above that?
Also, do you think this solution is even going to work?

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'] coded_alphabet = [] i = 0 for letter in alphabet: letter = alphabet[i] if i < 16: new = i+ 10 code_letter = alphabet[new] coded_alphabet.append(code_letter) i+=1 else: new = i+10-26 code_letter = alphabet[new] coded_alphabet.append(code_letter) i+=1 print(coded_alphabet) coded_message = "xuo jxuhu! jxyi yi qd unqcfbu ev q squiqh syfxuh. muhu oek qrbu je tusetu yj? y xefu ie! iudt cu q cuiiqwu rqsa myjx jxu iqcu evviuj!" i=0 decoded_message = [] for letter in coded_message: i= 0 while i <= 26: for code in coded_alphabet: if letter == code[i]: decoded_message.append(alphabet[i]) elif letter == ' ': decoded_message.append(' ') else: i+= 1 print(decoded_message)

What if line 28 is written as,

while i < 26:

?

still says it’s out of range :frowning:

is code a single letter, a list, or a longer string?

No, it won’t.
The for-loop for code in coded_alphabet is a different loop, so you’ve increased i so that i becomes 26 or more in the inner loop, and this condition is not checked by the outer while loop until after that inner for-loop finishes running.

@java9731188620 makes a good point: What is ‘code’, and should it be subscriptable, being only a single letter? Your loop may need a tiny bit of revision.