Problem - URLify

Problem

Write a method to replace all spaces in a string with ‘%20’. You may assume that the string has sufficient space at the end to hold the additional characters and that you are given the true length of the string.

def urlify(s: str):
    return "".join([i if i != ' ' else '%20' for i in s])

We can also use the built-in replace method

def urlify2(s: str):
    return s.replace(' ', '%20')