AttributeError: module 'typing' has no attribute 'Unpack'

[oroppas]

Feature

Missing Unpack in typing module. I encounter this when trying textual:

(venv) ryuta@orin:~/packages/rustpython$ rustpython -m textual
Traceback (most recent call last):
  File "/home/ryuta/packages/rustpython/rustpython/pylib/Lib/runpy.py", line 192, in _run_module_as_main
    sys.exit(msg)
  File "/home/ryuta/packages/rustpython/rustpython/pylib/Lib/runpy.py", line 187, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/home/ryuta/packages/rustpython/rustpython/pylib/Lib/runpy.py", line 151, in _get_module_details
    "be directly executed") %(e, mod_name))
  File "/home/ryuta/packages/rustpython/rustpython/pylib/Lib/runpy.py", line 146, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/home/ryuta/packages/rustpython/rustpython/pylib/Lib/runpy.py", line 117, in _get_module_details
    raise
  File "/home/ryuta/packages/rustpython/rustpython/pylib/Lib/runpy.py", line 110, in _get_module_details
    __import__(pkg_name)
  File "_frozen_importlib", line 1461, in __import__
  File "_frozen_importlib", line 1382, in _gcd_import
  File "_frozen_importlib", line 1352, in _find_and_load
  File "_frozen_importlib", line 1355, in _find_and_load
  File "_frozen_importlib", line 1329, in _find_and_load_unlocked
  File "_frozen_importlib", line 1326, in _find_and_load_unlocked
  File "_frozen_importlib", line 1326, in _find_and_load_unlocked
  File "_frozen_importlib", line 945, in _load_unlocked
  File "_frozen_importlib", line 943, in _load_unlocked
  File "_frozen_importlib", line 936, in _load_unlocked
  File "_frozen_importlib", line 930, in _load_unlocked
  File "_frozen_importlib_external", line 994, in exec_module
  File "_frozen_importlib", line 488, in _call_with_frames_removed
  File "/home/ryuta/packages/rustpython/venv/lib/rustpython3.12/site-packages/textual/__init__.py", line 9, in <module>
    from . import constants
  File "/home/ryuta/packages/rustpython/venv/lib/rustpython3.12/site-packages/textual/constants.py", line 10, in <module>
    from typing_extensions import Final, TypeGuard
  File "/home/ryuta/packages/rustpython/venv/lib/rustpython3.12/site-packages/typing_extensions.py", line 2235, in <module>
    Unpack = typing.Unpack
AttributeError: module 'typing' has no attribute 'Unpack'

Python Documentation or reference to CPython source code

https://docs.python.org/3/library/typing.html#typing.Unpack
https://github.com/python/cpython/blob/3.12/Lib/typing.py#L1603