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PEP 695: Lazy evaluation, concrete scoping semantics, other changes #3122

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It does not all have to be C
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JelleZijlstra committed Apr 25, 2023
commit 23a6c4d39ae180432c4abe87f322aa2d2d365179
8 changes: 5 additions & 3 deletions 8 pep-0695.rst
Original file line number Diff line number Diff line change
Expand Up @@ -833,9 +833,11 @@ Library Changes
---------------

Several classes in the ``typing`` module that are currently implemented in
Python must be reimplemented in C. This includes: ``TypeVar``,
``TypeVarTuple``, ``ParamSpec``, and ``Generic``. The new class
``TypeAliasType`` (described above) also must be implemented in C. The
Python must be partially implemented in C. This includes ``TypeVar``,
``TypeVarTuple``, ``ParamSpec``, and ``Generic``, and the new class
``TypeAliasType`` (described above). The implementation may delegate to the
Python version of ``typing.py`` for some behaviors that interact heavily with
the rest of the module. The
documented behaviors of these classes should not change.


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