pass
В ходе исполнения данного оператора ничего не происходит, поэтому он может использоваться в качестве заглушки в тех местах, где это синтаксически необходимо, например: в инструкциях, где тело является обязательным, таких как def, except и пр.
Зачастую pass используется там, где код пока ещё не появился, но планируется. Кроме этого, иногда, его используют при отладке, разместив на строчке с ним точку остановки.
Во многих случаях вместо pass можно сделать что-нибудь более полезное:
try:
some_func()
except AttributeError:
pass # Возможно стоит хотя бы записать исключение в журнал.
class MyException(Exception):
pass # Здесь лучше добавить строку документации для класса.
class MySubclass(MyClass):
def do_something(self):
pass
# Подобное «перекрытие» родительского метода — возможный индикатор
# проблем проектирования интерфейса.
with my_context() as my:
pass
# При таком подходе теряется сам смысл менеджера контекста.
What does the following code do? def a(b, c, d): pass
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What does the following code do?
def a(b, c, d): pass
the code defines a function named a which takes three arguments and does nothing.
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Что делает следующий код def a b c d pass
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