bpo-46981: Remove typing._TypingEmpty (GH-31836)

* get_args(Tuple[()]) now returns () instead of ((),).
* Tuple[Unpack[Ts]][()] now returns the result equal to Tuple[()].

1 files changed, 0 insertions, 10 deletions

diff --git a/Lib/typing.py b/Lib/typing.py
index 6930f5ddac..e8613625c3 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1220,7 +1220,6 @@ class _GenericAlias(_BaseGenericAlias, _root=True):
         if not isinstance(args, tuple):
             args = (args,)
         self.__args__ = tuple(... if a is _TypingEllipsis else
-                              () if a is _TypingEmpty else
                               a for a in args)
         self.__parameters__ = _collect_parameters(args)
         self._paramspec_tvars = _paramspec_tvars
@@ -1503,8 +1502,6 @@ class _CallableType(_SpecialGenericAlias, _root=True):
 class _TupleType(_SpecialGenericAlias, _root=True):
     @_tp_cache
     def __getitem__(self, params):
-        if params == ():
-            return self.copy_with((_TypingEmpty,))
         if not isinstance(params, tuple):
             params = (params,)
         if len(params) >= 2 and params[-1] is ...:
@@ -1735,13 +1732,6 @@ class Generic:
         cls.__parameters__ = tuple(tvars)
 
 
-class _TypingEmpty:
-    """Internal placeholder for () or []. Used by TupleMeta and CallableMeta
-    to allow empty list/tuple in specific places, without allowing them
-    to sneak in where prohibited.
-    """
-
-
 class _TypingEllipsis:
     """Internal placeholder for ... (ellipsis)."""