New GitHub issue #94439 from finite-state-machine:<br>

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**Documentation**

The `TypeDict` class exposes attributes `__required_keys__` and `__optional_keys__` starting in Python 3.9, but the documentation doesn't list the minimum version for these features, implying that they're available in Python 3.8.

c.f. https://github.com/python/cpython/blob/main/Doc/library/typing.rst near line 1827.
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<a href="https://github.com/python/cpython/issues/94439">View on GitHub</a>
<p>Labels: docs</p>
<p>Assignee: </p>