commit	44f4b5512f57642ffee591d8f81eced5ab08d6f3	[log] [tgz]
author	Android Build Coastguard Worker <[email protected]>	Tue Jul 09 23:15:57 2024 +0000
committer	Android Build Coastguard Worker <[email protected]>	Tue Jul 09 23:15:57 2024 +0000
tree	b71d7a0d4dd0dc63bd7297e24dce3eb0b43b21f5
parent	53e41c5aacb67855a9ccffb7d2b6cbaa3c600f90 [diff]
parent	9307e855a7457dd1520569b06b4dd063658a8716 [diff]

tree: b71d7a0d4dd0dc63bd7297e24dce3eb0b43b21f5

README.md

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.