how to handle zero division error python

1Python will display "ZeroDivisionError" if you divide something with zero

1import decimal
2from enum import Enum
3
4from gw_utility.logging import Logging
5from mpmath import mpf
6
7
8class NumberType(Enum):
9    """Specifies number type or library used for calculating values."""
10    INTEGER = 1
11    FLOAT = 2
12    DECIMAL = 3
13    MPMATH = 4
14
15
16def main():
17    Logging.line_separator("FRACTION TEST", 40, '+')
18
19    divide_test(5, 25)
20
21    Logging.line_separator("WHOLE NUMBER TEST", 40, '+')
22
23    divide_test(25, 5)
24
25    Logging.line_separator("DIVIDE BY ZERO TEST", 40, '+')
26
27    divide_test(5, 0)
28
29
30def divide_test(denominator, numerator):
31    """Perform division tests using all different numeric types and mathematic libraries.
32
33    :param denominator: Denominator.
34    :param numerator: Numerator.
35    """
36    Logging.line_separator('as int')
37    Logging.log(divide(denominator, numerator))
38
39    Logging.line_separator('as float')
40    Logging.log(divide(denominator, numerator, NumberType.FLOAT))
41
42    Logging.line_separator('as decimal.Decimal')
43    Logging.log(divide(denominator, numerator, NumberType.DECIMAL))
44
45    Logging.line_separator('as mpmath.mpf')
46    Logging.log(divide(denominator, numerator, NumberType.MPMATH))
47
48
49def divide(numerator, denominator, lib: NumberType = NumberType.INTEGER):
50    """Get result of division of numerator and denominator, using passed numeric type or library.
51
52    :param numerator: Numerator.
53    :param denominator: Denominator.
54    :param lib: Type of numeric value or library to use for calculation.
55    :return: Division result.
56    """
57    try:
58        if lib == NumberType.INTEGER:
59            # Divide using standard integer.
60            return numerator / denominator
61        elif lib == NumberType.FLOAT:
62            # Convert to floats before division.
63            return float(numerator) / float(denominator)
64        elif lib == NumberType.DECIMAL:
65            # Divide the decimal.Decimal value.
66            return decimal.Decimal(numerator) / decimal.Decimal(denominator)
67        elif lib == NumberType.MPMATH:
68            # Divide using the mpmath.mpf (real float) value.
69            return mpf(numerator) / mpf(denominator)
70        else:
71            # Divide using standard integer (default).
72            return numerator / denominator
73    except ZeroDivisionError as error:
74        # Output expected ZeroDivisionErrors.
75        Logging.log_exception(error)
76    except Exception as exception:
77        # Output unexpected Exceptions.
78        Logging.log_exception(exception, False)
79
80
81if __name__ == "__main__":
82    main()
83
84

1x = 0
2try:
3  answer = 1/x
4except ZeroDivisionError:
5  answer = 'undefined'
6print('The answer is {result}'.format(result=answer)
7