Question

我想创建带有两个默认参数的函数，另一个默认参数为* args和** kwargs

我具有使用参数和关键字的功能。如果在函数中我设置了前两个值，则一切正常，但我希望此参数为默认值。我该怎么办？

def the_credits(length_of_line=80, empty_space_between_lines=0, *args, **kwargs):
    for arg in args:
        for a in str(arg).center(length_of_line // 2):
            print(a, end='')
            if a != " ":
                time.sleep(0.4)
        print('\n' * empty_space_between_lines)
    for kwarg in kwargs:
        for k in (kwarg + ' : ' + kwargs[kwarg]).center(length_of_line // 2):
            print(k, end='')
            if k != " ":
                time.sleep(0.4)
        print('\n' * empty_space_between_lines)
    input()


the_credits("Cudny Program Pokazowy",
            "Zemsta zlego markiza Cul-de-Sac",
            Scenariusz="Autor",
            Scenografia="Autor",
            Kamerowanie="Brak",
            Kostiumy="Natura",
            Podziekowana="Pyton")

此示例有效

the_credits(80, 0, "Cudny Program Pokazowy",
            "Zemsta zlego markiza Cul-de-Sac",
            Scenariusz="Autor",
            Scenografia="Autor",
            Kamerowanie="Brak",
            Kostiumy="Natura",
            Podziekowana="Pyton")

Answer 1

您可以只使用kwargs和args并按名称指定这些有问题的参数；如果length_of_line或empty_space_between_lines中没有kwargs，则您知道使用默认值。

带有默认第一和第二参数的关键字参数

1 个答案: