gh-146406: add clear() cross-language hint for immutable types

Follow-up to PR #146407. Calling .clear() on a tuple, frozenset, or
frozendict now suggests the mutable counterpart (list / set / dict),
mirroring the existing append/extend/insert/remove/discard/update
entries for the same immutable types.

Triggered by @henryiii noticing that .clear() was the first method
they tried on these types and got no useful suggestion, and
@vstinner agreeing it was worth adding.

Signed-off-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

Author: mvanhorn

Lib/test/test_traceback.py

@@ -4637,6 +4637,9 @@ def test_cross_language_mutable_on_immutable(self):
             (frozenset, 'remove', "Did you mean to use a 'set' object?"),
             (frozenset, 'update', "Did you mean to use a 'set' object?"),
             (frozendict, 'update', "Did you mean to use a 'dict' object?"),
+            (tuple, 'clear', "Did you mean to use a 'list' object?"),
+            (frozenset, 'clear', "Did you mean to use a 'set' object?"),
+            (frozendict, 'clear', "Did you mean to use a 'dict' object?"),
         ]
         for test_type, attr, expected in cases:
             with self.subTest(type=test_type.__name__, attr=attr):

Lib/traceback.py

@@ -1775,6 +1775,10 @@ def print(self, *, file=None, chain=True, **kwargs):
     # frozendict -- mutable method on immutable type (user expected a dict)
     "update": ((frozenset, "Did you mean to use a 'set' object?", True),
                (frozendict, "Did you mean to use a 'dict' object?", True)),
+    # clear() -- shared across immutable container types (user expected the mutable counterpart)
+    "clear": ((tuple, "Did you mean to use a 'list' object?", True),
+              (frozenset, "Did you mean to use a 'set' object?", True),
+              (frozendict, "Did you mean to use a 'dict' object?", True)),
     # float -- bitwise operators belong to int
     "__or__": ((float, "Did you mean to use an 'int' object? Bitwise operators are not supported by 'float'.", True),),
     "__and__": ((float, "Did you mean to use an 'int' object? Bitwise operators are not supported by 'float'.", True),),

Misc/NEWS.d/next/Library/2026-05-16-22-00-00.gh-issue-146406.10e0da.rst

@@ -0,0 +1,3 @@
+Add cross-language hints for ``.clear()`` on :class:`tuple`,
+:class:`frozenset`, and :class:`frozendict`, suggesting the mutable
+counterpart. Follow-up to :gh:`146406`.