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.
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.
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