GH-127682: Only call __iter__ once in generator expressions.
#132351
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iritkatriel
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Apr 10, 2025
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Thanks @markshannon for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13. |
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Sorry, @markshannon, I could not cleanly backport this to |
markshannon
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Apr 11, 2025
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Do you need to bump the magic number here? I forgot if compiler-only changes need that. |
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I don’t think so, since the bytecode format and behavior is unchanged. |
markshannon
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Apr 29, 2025
This was referenced May 25, 2025
| >>> list(g) | ||
| [0, 1, 4, 9, 16, 25, 36, 49, 64, 81] | ||
| Verify that the outermost for-expression makes an immediate check |
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If this change of behaviour is actually desirable (which may require some further discussion to establish), it should be mentioned in the What's New documentation. |
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See #135171 (comment) for a more detailed analysis I'll make a PR for the what's new |
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Removes the extra
GET_ITERinstruction emitted when creating a generator expression.This:
__iter__method to be used in generator expressions, as they were up until 3.12.