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Add to README (#81)
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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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JelleZijlstra and AlexWaygood authored Oct 6, 2022
1 parent 3c21f33 commit 354b938
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21 changes: 17 additions & 4 deletions README.md
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Expand Up @@ -35,7 +35,9 @@ This module currently contains the following:

- Experimental features

- (Currently none)
- `override` (see PEP 698)
- The `default=` argument to `TypeVar`, `ParamSpec`, and `TypeVarTuple` (see PEP 696)
- The `infer_variance=` argument to `TypeVar` (see PEP 695)

- In `typing` since Python 3.11

Expand All @@ -50,13 +52,13 @@ This module currently contains the following:
- `reveal_type`
- `Required` (see PEP 655)
- `Self` (see PEP 673)
- `TypeVarTuple` (see PEP 646)
- `TypeVarTuple` (see PEP 646; the `typing_extensions` version supports the `default=` argument from PEP 696)
- `Unpack` (see PEP 646)

- In `typing` since Python 3.10

- `Concatenate` (see PEP 612)
- `ParamSpec` (see PEP 612)
- `ParamSpec` (see PEP 612; the `typing_extensions` version supports the `default=` argument from PEP 696)
- `ParamSpecArgs` (see PEP 612)
- `ParamSpecKwargs` (see PEP 612)
- `TypeAlias` (see PEP 613)
Expand Down Expand Up @@ -96,7 +98,6 @@ This module currently contains the following:
- `Counter`
- `DefaultDict`
- `Deque`
- `NamedTuple`
- `NewType`
- `NoReturn`
- `overload`
Expand All @@ -105,6 +106,13 @@ This module currently contains the following:
- `TYPE_CHECKING`
- `get_type_hints`

- The following have always been present in `typing`, but the `typing_extensions` versions provide
additional features:

- `Any` (supports inheritance since Python 3.11)
- `NamedTuple` (supports multiple inheritance with `Generic` since Python 3.11)
- `TypeVar` (see PEPs 695 and 696)

# Other Notes and Limitations

Certain objects were changed after they were added to `typing`, and
Expand All @@ -125,6 +133,11 @@ Certain objects were changed after they were added to `typing`, and
`@typing_extensions.overload`.
- `NamedTuple` was changed in Python 3.11 to allow for multiple inheritance
with `typing.Generic`.
- Since Python 3.11, it has been possible to inherit from `Any` at
runtime. `typing_extensions.Any` also provides this capability.
- `TypeVar` gains two additional parameters, `default=` and `infer_variance=`,
in the draft PEPs 695 and 696, which are being considered for inclusion
in Python 3.12.

There are a few types whose interface was modified between different
versions of typing. For example, `typing.Sequence` was modified to
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1 change: 0 additions & 1 deletion src/typing_extensions.py
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Expand Up @@ -8,7 +8,6 @@
import typing


# Please keep __all__ alphabetized within each category.
__all__ = [
# Super-special typing primitives.
'Any',
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