Set module dunder for group by classes

Author: ofsouzap

pandas/core/groupby/generic.py

@@ -144,6 +144,7 @@ class NamedAgg(NamedTuple):
     aggfunc: AggScalar
 
 
+@set_module("pandas.api.typing")
 class SeriesGroupBy(GroupBy[Series]):
     def _wrap_agged_manager(self, mgr: Manager) -> Series:
         out = self.obj._constructor_from_mgr(mgr, axes=mgr.axes)
@@ -1557,6 +1558,7 @@ def unique(self) -> Series:
         return result
 
 
+@set_module("pandas.api.typing")
 class DataFrameGroupBy(GroupBy[DataFrame]):
     _agg_examples_doc = dedent(
         """

pandas/tests/api/test_api.py

@@ -421,3 +421,5 @@ def test_set_module():
     assert pd.date_range.__module__ == "pandas"
     assert pd.bdate_range.__module__ == "pandas"
     assert pd.NamedAgg.__module__ == "pandas"
+    assert pd.api.typing.SeriesGroupBy.__module__ == "pandas.api.typing"
+    assert pd.api.typing.DataFrameGroupBy.__module__ == "pandas.api.typing"