Isomorphic Strings

Problem Statement:

Given two strings s and t, determine if they are isomorphic.
Two strings are isomorphic if the characters in s can be replaced to get t.
All occurrences of a character must be replaced with another character while preserving the order of characters. No two characters may map to the same character but a character may map to itself.

Example 1:
Input: s = "egg", t = "add"
Output: true

Example 2:
Input: s = "foo", t = "bar"
Output: false

Example 3:
Input: s = "paper", t = "title"
Output: true



Solution:

class Solution(object):
    def isIsomorphic(self, s, t):
        S=map(s.index,s)
        T=map(t.index,t)
        return S==T