Подтвердить что ты не робот

Каков наилучший способ выхода из функции (которая не имеет возвращаемого значения) в python перед завершением функции (например, сбой проверки)?

Предположим, что итерация называется функцией без возвращаемого значения. Как я думаю, моя программа должна вести себя, объясняется в этом псевдокоде:

for element in some_list:
    foo(element)

def foo(element):
    do something
    if check is true:
        do more (because check was succesful)
    else:
        return None
    do much much more...

Если я реализую это в python, это беспокоит меня, что функция возвращает None. Есть ли лучший способ "выхода из функции, которая не имеет возвращаемого значения, если проверка не проходит в теле функции"?

Ответ 1

Вы можете просто использовать

return

который делает то же самое, что и

return None

Ваша функция также вернет None, если выполнение достигнет конца тела функции, не нажав оператор return. Возвращение ничего не совпадает с возвратом None в Python.

Ответ 2

Я бы предложил:

def foo(element):
    do something
    if not check: return
    do more (because check was succesful)
    do much much more...

Ответ 3

вы можете использовать оператор return без каких-либо параметров для выхода из функции

def foo(element):
    do something
    if check is true:
        do more (because check was succesful)
    else:
        return
    do much much more...

или вызвать исключение, если вы хотите получить информацию о проблеме

def foo(element):
    do something
    if check is true:
        do more (because check was succesful)
    else:
        raise Exception("cause of the problem")
    do much much more...

Ответ 4

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