python/python3-typing-extensions: Added (Python3 version of typing-extensions).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/python/python3-typing-extensions/README b/python/python3-typing-extensions/README
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+Typing Extensions – Backported and Experimental Type Hints for Python
+
+The typing_extensions module serves two related purposes:
+
+- Enable use of new type system features on older Python versions. For
+  example, `typing.TypeGuard` is new in Python 3.10, but
+  typing_extensions allows users on previous Python versions to use it
+  too.
+- Enable experimentation with new type system PEPs before they are
+  accepted and added to the typing module.
+
+typing_extensions is treated specially by static type checkers such as
+mypy and pyright. Objects defined in typing_extensions are treated the
+same way as equivalent forms in typing.