> Please note that this is a thread about PEP 649. > > If PEP 649 accepted and PEP 563 dies, all such idioms breaks annotation completely. > > Users need to import all heavy modules and circular references used only type hints, or user can not get even string form annotation which is very useful for REPLs.
I don't see why `if TYPE_CHECKING:` idiom breaks annotations with PEP 649. There will be no error as long as `__annotations__` descriptor is not called. And currently in 3.9 (with or without `from __future__ import annotations`), the issue is the same: you `get_type_hints` fails if some of the types in the annotations have been imported in a `if TYPE_CHECKING:` block. > Hm, that's a rather serious problem with Larry's PEP 649 compared to from __future__ import annotations, actually. As I've written above, this is not a new issue, and neither this PEP nor PEP 563 can fix it. _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/PVPCJV6GATMRACXIPPNSNCUV7OFGDEU3/ Code of Conduct: http://python.org/psf/codeofconduct/
