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Некоторым генераторам нужно возвращать все элементы другого генератора:


>>> def enclose(gen, before='{', after='}'):
... yield before
... for x in gen:
... yield x
... yield after
...
>>> list(enclose(range(5)))
['{', 0, 1, 2, 3, 4, '}']


Однако предпочтительнее использовать yield from:


>>> def enclose(gen, before='{', after='}'):
... yield before
... yield from gen
... yield after


yield from не только работает быстрее, но и автоматически обрабатывает передачу значений во вложенные генераторы, возврат значений из генераторов и даже выброс исключений внутри вложенного генератора.

👉@BookPython



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Некоторым генераторам нужно возвращать все элементы другого генератора:


>>> def enclose(gen, before='{', after='}'):
... yield before
... for x in gen:
... yield x
... yield after
...
>>> list(enclose(range(5)))
['{', 0, 1, 2, 3, 4, '}']


Однако предпочтительнее использовать yield from:


>>> def enclose(gen, before='{', after='}'):
... yield before
... yield from gen
... yield after


yield from не только работает быстрее, но и автоматически обрабатывает передачу значений во вложенные генераторы, возврат значений из генераторов и даже выброс исключений внутри вложенного генератора.

👉@BookPython

BY Библиотека Python разработчика | Книги по питону


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