Reverse Integer leetcode python

class Solution(object):
def reverse(self,x):
"""

:param x:int
:return: int
"""
max_num=2147483647
min_num=-2147483648

flag=0
if x<0:
flag=1
x=-x

if flag==0:
if int(str(x)[::-1])>max_num or int(str(x)[::-1])<min_num:
return 0
else:
return int(str(x)[::-1])
else:
if int(str(x)[::-1])>max_num or int(str(x)[::-1])<min_num:
return 0
else:
return -int(str(x)[::-1])

p=Solution()
print p.reverse(1534236469)