Remove downcast argument from resample.interpolate (#62866)

Author: phofl

pandas/core/resample.py

@@ -850,7 +850,6 @@ def interpolate(
  inplace: bool = False,
  limit_direction: Literal["forward", "backward", "both"] = "forward",
  limit_area=None,
- downcast=lib.no_default,
  **kwargs,
  ):
  """
@@ -907,11 +906,6 @@ def interpolate(
  (interpolate).
  * 'outside': Only fill NaNs outside valid values (extrapolate).
 
- downcast : optional, 'infer' or None, defaults to None
- Downcast dtypes if possible.
-
- .. deprecated:: 2.1.0
-
  **kwargs : optional
  Keyword arguments to pass on to the interpolating function.
 
@@ -993,7 +987,6 @@ def interpolate(
  Note that the series correctly decreases between two anchors
  ``07:00:00`` and ``07:00:02``.
  """
- assert downcast is lib.no_default # just checking coverage
  result = self._upsample("asfreq")
 
  # If the original data has timestamps which are not aligned with the
@@ -1030,7 +1023,6 @@ def interpolate(
  inplace=inplace,
  limit_direction=limit_direction,
  limit_area=limit_area,
- downcast=downcast,
  **kwargs,
  )
 

pandas/tests/copy_view/test_interp_fillna.py

@@ -134,7 +134,7 @@ def test_interpolate_object_convert_copies():
  arr_a = get_array(df, "a")
  msg = "Can not interpolate with method=pad"
  with pytest.raises(ValueError, match=msg):
- df.interpolate(method="pad", inplace=True, downcast="infer")
+ df.interpolate(method="pad", inplace=True)
 
  assert df._mgr._has_no_reference(0)
  assert np.shares_memory(arr_a, get_array(df, "a"))
@@ -148,7 +148,7 @@ def test_interpolate_downcast_reference_triggers_copy():
 
  msg = "Can not interpolate with method=pad"
  with pytest.raises(ValueError, match=msg):
- df.interpolate(method="pad", inplace=True, downcast="infer")
+ df.interpolate(method="pad", inplace=True)
  assert df._mgr._has_no_reference(0)
  assert not np.shares_memory(arr_a, get_array(df, "a"))