mypy fixup

pandas/core/generic.py

@@ -7041,7 +7041,11 @@ def fillna(
  axis=axis,
  limit=limit,
  inplace=inplace,
- downcast=downcast,
+ # error: Argument "downcast" to "_fillna_with_method" of "NDFrame"
+ # has incompatible type "Union[Dict[Any, Any], None,
+ # Literal[_NoDefault.no_default]]"; expected
+ # "Optional[Dict[Any, Any]]"
+ downcast=downcast, # type: ignore[arg-type]
  )
  else:
  if self.ndim == 1:
@@ -7088,11 +7092,15 @@ def fillna(
  if was_no_default:
  downcast_k = lib.no_default
  else:
- # error: Item "None" of "Optional[Dict[Any, Any]]" has no
- # attribute "get"
  downcast_k = (
- downcast
+ # error: Incompatible types in assignment (expression
+ # has type "Union[Dict[Any, Any], None,
+ # Literal[_NoDefault.no_default], Any]", variable has
+ # type "_NoDefault")
+ downcast # type: ignore[assignment]
  if not is_dict
+ # error: Item "None" of "Optional[Dict[Any, Any]]" has
+ # no attribute "get"
  else downcast.get(k) # type: ignore[union-attr]
  )
 
@@ -7247,7 +7255,14 @@ def ffill(
  downcast = self._deprecate_downcast(downcast, "ffill")
 
  return self._fillna_with_method(
- "ffill", axis=axis, inplace=inplace, limit=limit, downcast=downcast
+ "ffill",
+ axis=axis,
+ inplace=inplace,
+ limit=limit,
+ # error: Argument "downcast" to "_fillna_with_method" of "NDFrame"
+ # has incompatible type "Union[Dict[Any, Any], None,
+ # Literal[_NoDefault.no_default]]"; expected "Optional[Dict[Any, Any]]"
+ downcast=downcast, # type: ignore[arg-type]
  )
 
  @final
@@ -7373,7 +7388,14 @@ def bfill(
  """
  downcast = self._deprecate_downcast(downcast, "bfill")
  return self._fillna_with_method(
- "bfill", axis=axis, inplace=inplace, limit=limit, downcast=downcast
+ "bfill",
+ axis=axis,
+ inplace=inplace,
+ limit=limit,
+ # error: Argument "downcast" to "_fillna_with_method" of "NDFrame"
+ # has incompatible type "Union[Dict[Any, Any], None,
+ # Literal[_NoDefault.no_default]]"; expected "Optional[Dict[Any, Any]]"
+ downcast=downcast, # type: ignore[arg-type]
  )
 
  @final