Reverse Integer

class Solution:    # @param {integer} x    # @return {integer}    def reverse(self, x):        max=0x7fffffff        min=-0x80000000        flag=False        if x<0:            flag=True            x=-x        mystr=str(x)[::-1]        y=int(mystr,10)        if flag:            y=-y        if y>max or y <min:            return 0        else:            return y