How can I replace multiple characters in a string using python?

Question

I am having some trouble figuring out how to replace multiple characters in a string.I am trying to write a functions called replace(string) that takes in an input, and repl

Answer 1

Note that your calls are structured in such a way that W is replaced with Y in the first call, and then Y is again replaced with W in the third call, undoing the first call's output.

You should be using str.translate, it's much more efficient and robust than a bunch of chained replace calls:

_tab = str.maketrans(dict(zip('WXYZ', 'YZWX')))
def replace(string):
    return string.translate(_tab)

---

>>> replace('WXYZ')
'YZWX'
>>> replace("WWZYWXXWYYZW")
'YYXWYZZYWWXY'