Typing Extensions

Documentation – PyPI

Overview

The

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.

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

.

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

.