gh-135171: Update documentation for the generator expression #135351
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Document that the iterator for the leftmost "for" clause is created immediately.
Yhg1s
reviewed
Jun 10, 2025
| @@ -406,7 +406,8 @@ brackets or curly braces. | |||
| Variables used in the generator expression are evaluated lazily when the | |||
| :meth:`~generator.__next__` method is called for the generator object (in the same | |||
| fashion as normal generators). However, the iterable expression in the | |||
| leftmost :keyword:`!for` clause is immediately evaluated, so that an error | |||
| leftmost :keyword:`!for` clause is immediately evaluated, and the | |||
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It is the same. async for is mentioned at the end of this section. What is written here applies to synchronous and asynchronous generator expressions (which are created not only by async for).
bskinn
suggested changes
Jun 10, 2025
Co-authored-by: Brian Skinn <brian.skinn@gmail.com>
efimov-mikhail
approved these changes
Jun 10, 2025
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Document that the iterator for the leftmost "for" clause is created immediately.
📚 Documentation preview 📚: https://cpython-previews--135351.org.readthedocs.build/