Python ：数值的整数次方

# -*- coding:utf-8 -*-
class Solution:
def Power(self, base, exponent):
if exponent == 0:
return 1
elif exponent > 0:
ans = 1.0
for i in range(exponent):
ans *= base
return ans
else:
ans = 1.0
a = abs(exponent)
for i in range(a):
ans *= base
ans = 1 / ans
return ans