数值的整数次方

class Solution:
    def Power(self, base, exponent):
        # write code here
        if base == 0:
            return False
        if base == 1 or exponent==0:
            return 1
        res = 1
        for i in range(abs(exponent)):
            res*=base
        if exponent < 0:
            res = 1/res
        return res