Cipher a friend made up

friendCipher

key1 = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]
key2 = ['z', 'y', 'x', 'w', 'v', 'u', 't', 's', 'r', 'q', 'p', 'o', 'n', 'm', 'l', 'k', 'j', 'i', 'h', 'g', 'f', 'e', 'd', 'c', 'b', 'a']

import re

def encrypt(string):
    #first split it into a list of words
    wordList = re.sub("[^\w]", " ",  string).split()
    useKey = key1
    encodedString = "|"
    for word in wordList:
        encodedWord = ""
        for character in word:
            encodedWord = encodedWord + str(useKey.index(character)) + "."
        encodedWord = encodedWord.rstrip(".") + "|"
        encodedString = encodedString + encodedWord
        if (useKey == key1):
            useKey = key2
        elif (useKey == key2):
            useKey = key1
    return encodedString

def decrypt(string):
    wordList = string.split("|")
    useKey = key1
    decodedString = ""
    wordList.remove("")
    wordList.remove("")
    for word in wordList:
        charList = word.split(".")
        decodedWord = ""
        print(charList)
        for char in charList:
            if (char != " " or char != ""):
                decodedWord = decodedWord + useKey[int(char)]
        decodedString = decodedString + decodedWord + " "

        if (useKey == key1):
            useKey = key2
            print("Switching to key 2...")
        elif (useKey == key2):
            useKey = key1
            print("Switching to key 1...")

    decodedString = decodedString.rstrip(" ")
    return decodedString