freq shift

eightyseven · eightyseven · commit 5b09b0c86dfb · 2024-11-04T11:21:39.000+08:00
diff --git a/pandas/core/frame.py b/pandas/core/frame.py
@@ -5705,7 +5705,7 @@ def shift(
                 "Passing a 'freq' together with a 'fill_value' is not allowed."
             )
 
-        if self.empty:
+        if self.empty and freq is None:
             return self.copy()
 
         axis = self._get_axis_number(axis)

Original file line number	Diff line number	Diff line change
`@@ -5705,7 +5705,7 @@ def shift(`
`5705`	`5705`	`"Passing a 'freq' together with a 'fill_value' is not allowed."`
`5706`	`5706`	`)`
`5707`	`5707`
`5708`		`- if self.empty:`
	`5708`	`+ if self.empty and freq is None:`
`5709`	`5709`	`return self.copy()`
`5710`	`5710`
`5711`	`5711`	`axis = self._get_axis_number(axis)`