Message 409366 - Python tracker

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Author	wrobell
Recipients	AlexWaygood, evansd, lukasz.langa, rhettinger, uriyyo, wrobell
Date	2021-12-30.12:55:43
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1640868943.93.0.941131859284.issue46014@roundup.psfhosted.org>
In-reply-to

Content
Will it support Optional as well? According to PEP-604, these two shall be equivalent (using Python 3.10 below)? ``` type(int \| None) types.UnionType type(tp.Optional[int]) typing._UnionGenericAlias ``` Also, IMHO, the documentation of singledispatch should be improved. It needs to state that only Python types are supported with few exceptions (union type now), but other annotation types are not supported, i.e. generics like `list[int]`.

Will it support Optional as well?

According to PEP-604, these two shall be equivalent (using Python 3.10 below)?
```
type(int | None)
types.UnionType

type(tp.Optional[int])
typing._UnionGenericAlias
```

Also, IMHO, the documentation of singledispatch should be improved. It needs to state that only Python types are supported with few exceptions (union type now), but other annotation types are not supported, i.e. generics like `list[int]`.

History
Date	User	Action	Args
2021-12-30 12:55:43	wrobell	set	recipients: + wrobell, rhettinger, lukasz.langa, uriyyo, AlexWaygood, evansd
2021-12-30 12:55:43	wrobell	set	messageid: <1640868943.93.0.941131859284.issue46014@roundup.psfhosted.org>
2021-12-30 12:55:43	wrobell	link	issue46014 messages
2021-12-30 12:55:43	wrobell	create