String - 7. Reverse Integer

#===================================
# Tanzila Islam
# Email: tanzilamohita@gmail.com
# Language: Python 3
#===================================
class Solution:
    def reverse(self, x: int) -> int:
        x_str = str(x)

        if x_str[0] == '-':
            a = x_str[::-1]
            rev = int(x_str[0]+a[:-1])
        else:
            rev = int(x_str[::-1])
        
        if rev not in range((-1 << 31), (1 << 31) - 1):
            return 0
        else:
            return rev