CLN: _get_daily_rule (#37775)

Author: jbrockmendel

pandas/core/arrays/datetimelike.py

@@ -143,14 +143,6 @@ def _scalar_from_string(self, value: str) -> DTScalarOrNaT:
         """
         raise AbstractMethodError(self)
 
-    @classmethod
-    def _rebox_native(cls, value: int) -> Union[int, np.datetime64, np.timedelta64]:
-        """
-        Box an integer unboxed via _unbox_scalar into the native type for
-        the underlying ndarray.
-        """
-        raise AbstractMethodError(cls)
-
     def _unbox_scalar(
         self, value: DTScalarOrNaT, setitem: bool = False
     ) -> Union[np.int64, np.datetime64, np.timedelta64]:

pandas/tseries/frequencies.py

@@ -321,13 +321,7 @@ def _infer_daily_rule(self) -> Optional[str]:
             return _maybe_add_count(monthly_rule, self.mdiffs[0])
 
         if self.is_unique:
-            days = self.deltas[0] / _ONE_DAY
-            if days % 7 == 0:
-                # Weekly
-                day = int_to_weekday[self.rep_stamp.weekday()]
-                return _maybe_add_count(f"W-{day}", days / 7)
-            else:
-                return _maybe_add_count("D", days)
+            return self._get_daily_rule()
 
         if self._is_business_daily():
             return "B"
@@ -338,6 +332,16 @@ def _infer_daily_rule(self) -> Optional[str]:
 
         return None
 
+    def _get_daily_rule(self) -> Optional[str]:
+        days = self.deltas[0] / _ONE_DAY
+        if days % 7 == 0:
+            # Weekly
+            wd = int_to_weekday[self.rep_stamp.weekday()]
+            alias = f"W-{wd}"
+            return _maybe_add_count(alias, days / 7)
+        else:
+            return _maybe_add_count("D", days)
+
     def _get_annual_rule(self) -> Optional[str]:
         if len(self.ydiffs) > 1:
             return None
@@ -406,14 +410,7 @@ def _get_wom_rule(self) -> Optional[str]:
 class _TimedeltaFrequencyInferer(_FrequencyInferer):
     def _infer_daily_rule(self):
         if self.is_unique:
-            days = self.deltas[0] / _ONE_DAY
-            if days % 7 == 0:
-                # Weekly
-                wd = int_to_weekday[self.rep_stamp.weekday()]
-                alias = f"W-{wd}"
-                return _maybe_add_count(alias, days / 7)
-            else:
-                return _maybe_add_count("D", days)
+            return self._get_daily_rule()
 
 
 def _is_multiple(us, mult: int) -> bool: