461. Hamming Distance

class Solution(object):
    def hammingDistance(self, x, y):
        """
        :type x: int
        :type y: int
        :rtype: int
        """
        res = x^y
        res = bin(res)
        cont = 0
        for i in list(res)[2:]:
            if i == '1':
                cont += 1
        return cont

# or use one line:  return bin(x^y).count('1')