reverse_int.py

# Given an integer, return the integer with reversed digits.
# Note: The integer could be either positive or negative.

def solution(x):
    string = str(x)
    
    if string[0] == '-':
        return int('-'+string[:0:-1])
    else:
        return int(string[::-1])
    
print(solution(-231))
print(solution(345))

>>> str(-1999)[::-1].rstrip("-")
'9991'
>>> str(1999)[::-1].rstrip("-")
'9991'

Very helpful on algorithm tests. Thanks