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Typing Extensions

Overview

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.

typing_extensions uses
Semantic Versioning. The
major version will be incremented only for backwards-incompatible changes.
Therefore, it's safe to depend
on typing_extensions like this: typing_extensions >=x.y, <(x+1),
where x.y is the first version that includes all features you need.

Included items

See the documentation for a
complete listing of module contents.

Contributing

See CONTRIBUTING.md
for how to contribute to typing_extensions.

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typing-extensions

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