Factorial calculation implementation with python

factorial.py

from time import clock
from collections import namedtuple

FACTORIAL_NUMBER = 12


def factorial(x: int) -> int:
    if x < 1:
        raise Exception('The number should be grater than 1')

    res = 1
    for i in range(1, x + 1):
        res *= i
    return res


def recursive_factorial(x: int) -> int:
    if x == 1:
        return 1
    elif x < 1:
        raise Exception('The number should be grater than 1')
    return x * factorial(x - 1)


def print_results(functions: list, *args) -> None:
    Output = namedtuple('Output', ['func_name', 'result', 'time'])
    title = Output('Function', 'Result', 'Time')
    results = [title]

    for func in functions:
        search_start = clock()
        res = func(*args)
        search_time = clock() - search_start
        results.append(Output(func.__name__, res, search_time))

    func_name_column_size = max([len(str(result.func_name)) for result in results])
    res_column_size = max([len(str(result.result)) for result in results])
    time_column_size = max([len(str(result.time)) for result in results])

    for _name, _result, _time in results:
        print(f'{_name:<{func_name_column_size}} | {str(_result):<{res_column_size}} | '
              f'{_time:<{time_column_size}}')


if __name__ == "__main__":
    print_results([factorial, recursive_factorial], FACTORIAL_NUMBER)