python-typing-extensions: python-typing-extensions (Backported and Experimental Type Hints)
python-typing-extensions:
python-typing-extensions: The typing_extensions module serves two related purposes:
python-typing-extensions:
python-typing-extensions: - Enable use of new type system features on older Python versions.
python-typing-extensions: - Enable experimentation with new type system PEPs before they are
python-typing-extensions:   accepted and added to the typing module.
python-typing-extensions:
python-typing-extensions:
python-typing-extensions:
python-typing-extensions: