Caesar.py (PSET 6) ValueError: invalid literal for int() with base 10

Question

I converted my C code into Python, but keep getting this error: ValueError: invalid literal for int() with base 10.

This is what my terminal is returning:

$ python caesar.py 3
hello
Traceback (most recent call last):
  File "caesar.py", line 24, in <module>
    userMessage[i] = (((int(userMessage[i]) - ord('a')) + key) % 26) + ord('a') 
ValueError: invalid literal for int() with base 10: 'h'

What am I doing wrong? Is it the int() or the ord() or both?

I appreciate the help, guys. Thanks.

Answer 1

The message is telling you that 'h' cannot be changed to an int. True enough.

From the Hints section of the spec:

You might find chr and/or ord of help.

I think chr is what you want, not int.

Answer 2

I got it. wrap i in ord() and the whole cipher calculation for i in chr() :)