use python language

Write the following functions and provide a program to test them, for each function create at least 2 test cases 1. def allThesame(x y,z) This function will determine whether all the values are the same, if they are the function should return true, if there are not all the same it should return false. 2. def countVowels(str) This function will return a count of all vowels in the string str. Vowels are the letters a, e, i, o,u