Jacob Hayes <[email protected]> added the comment:
Thanks for the tips! I've been using this patch in my own code in a early
imported `__init__.py`:
```
from graphlib import TopologicalSorter
from types import GenericAlias
if not hasattr(TopologicalSorter, "__class_getitem__"): # pragma: no cover
TopologicalSorter.__class_getitem__ = classmethod(GenericAlias) # type:
ignore
```
Certainly a bit hacky, but aside from no-op on >=3.11 and satisfying mypy, it
supports runtime type inspection via `get_type_hints` before 3.11 (which
otherwise still errors for stringized versions). The stringized versions are
probably a bit simpler/safer for most folks though :)
----------
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<https://bugs.python.org/issue45359>
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