| Description: | 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. |
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