leetcode07

"""
Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
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Note:
The input is assumed to be a 32-bit signed integer. Your function should return 0 when the reversed integer overflows.
"""
class (object):
    def reverse(self, x):
        """
        :type x: int
        :rtype: int
        """
        temp = 1
        new_x = []
        if x > (2**31) or x < -(2**32):
            return 0
        if x < 0:
            x = abs(x)
            temp = -1
        x = str(x)
        for i in range(-1, -(len(x) + 1), -1):
            new_x.append(x[i])
        x = int(''.join(new_x))*temp
        if x > (2**31) or x < -(2**31):
            return 0