191 Number of 1 Bits

原题链接：Number of 1 Bits

感受一下Python的强大吧！！！
代码如下：

class Solution:
    # @param n, an integer
    # @return an integer
    def hammingWeight(self, n):
        count = 0
        num = list(bin(n))
        for bit in num:
            if bit is '1':
                count += 1
        return count