转载Python 的zip函数

链接： https://www.cnblogs.com/frydsh/archive/2012/07/10/2585370.html

letcode205---Isomorphic Strings

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.

For example,
Given "egg", "add", return true.

Given "foo", "bar", return false.

Given "paper", "title", return true.

用zip函数，可以很快求解，如果两条链是同构，则s有多少种字符，t也有多少种字符。