ENH: set __module__ for pandas scalars (Timestamp/Timedelta/Period)

pandas/_libs/tslibs/period.pyx

@@ -114,6 +114,7 @@ from pandas._libs.tslibs.offsets import (
     INVALID_FREQ_ERR_MSG,
     BDay,
 )
+from pandas.util._decorators import set_module
 
 cdef:
     enum:
@@ -2830,6 +2831,7 @@ cdef class _Period(PeriodMixin):
         return period_format(self.ordinal, base, fmt)
 
 
+@set_module("pandas")
 class Period(_Period):
     """
     Represents a period of time.

pandas/_libs/tslibs/timedeltas.pyx

@@ -1,6 +1,7 @@
 import collections
 import warnings
 
+from pandas.util._decorators import set_module
 from pandas.util._exceptions import find_stack_level
 
 cimport cython
@@ -1854,7 +1855,7 @@ cdef class _Timedelta(timedelta):
 
 # Python front end to C extension type _Timedelta
 # This serves as the box for timedelta64
-
+@set_module("pandas")
 class Timedelta(_Timedelta):
     """
     Represents a duration, the difference between two dates or times.
@@ -1916,7 +1917,7 @@ class Timedelta(_Timedelta):
     --------
     Here we initialize Timedelta object with both value and unit
 
-    >>> td = pd.Timedelta(1, "d")
+    >>> td = pd.Timedelta(1, "D")
     >>> td
     Timedelta('1 days 00:00:00')
 

pandas/_libs/tslibs/timestamps.pyx

@@ -50,6 +50,7 @@ import datetime as dt
 from pandas._libs.tslibs cimport ccalendar
 from pandas._libs.tslibs.base cimport ABCTimestamp
 
+from pandas.util._decorators import set_module
 from pandas.util._exceptions import find_stack_level
 
 from pandas._libs.tslibs.conversion cimport (
@@ -1648,7 +1649,7 @@ cdef class _Timestamp(ABCTimestamp):
 # Python front end to C extension type _Timestamp
 # This serves as the box for datetime64
 
-
+@set_module("pandas")
 class Timestamp(_Timestamp):
     """
     Pandas replacement for python datetime.datetime object.
@@ -2926,7 +2927,7 @@ timedelta}, default 'raise'
         --------
         >>> ts = pd.Timestamp(1584226800, unit='s', tz='Europe/Stockholm')
         >>> ts.tz
-        <DstTzInfo 'Europe/Stockholm' CET+1:00:00 STD>
+        zoneinfo.ZoneInfo(key='Europe/Stockholm')
         """
         return self.tzinfo
 

pandas/tests/api/test_api.py

@@ -400,3 +400,6 @@ def test_util_in_top_level(self):
 
 def test_set_module():
     assert pd.DataFrame.__module__ == "pandas"
+    assert pd.Period.__module__ == "pandas"
+    assert pd.Timestamp.__module__ == "pandas"
+    assert pd.Timedelta.__module__ == "pandas"

pandas/tests/tslibs/test_timezones.py

@@ -144,7 +144,7 @@ def test_maybe_get_tz_invalid_types():
     with pytest.raises(TypeError, match="<class 'module'>"):
         timezones.maybe_get_tz(pytest)
 
-    msg = "<class 'pandas._libs.tslibs.timestamps.Timestamp'>"
+    msg = "<class 'pandas.Timestamp'>"
     with pytest.raises(TypeError, match=msg):
         timezones.maybe_get_tz(Timestamp("2021-01-01", tz="UTC"))