DEPR: removed long deprecated input param 'axis' in .replace() (#20789)

doc/source/whatsnew/v0.23.0.txt

@@ -1037,6 +1037,7 @@ Removal of prior version deprecations/changes
   ``ambiguous='infer'``, and ``infer_dst=False`` to ``ambiguous='raise'`` (:issue:`7963`).
 - When ``.resample()`` was changed from an eager to a lazy operation, like ``.groupby()`` in v0.18.0, we put in place compatibility (with a ``FutureWarning``),
   so operations would continue to work. This is now fully removed, so a ``Resampler`` will no longer forward compat operations (:issue:`20554`)
+- Remove long deprecated ``axis=None`` parameter from ``.replace()`` (:issue:`20271`)
 
 .. _whatsnew_0230.performance:
 

pandas/core/frame.py

@@ -3790,11 +3790,11 @@ def fillna(self, value=None, method=None, axis=None, inplace=False,
 
     @Appender(_shared_docs['replace'] % _shared_doc_kwargs)
     def replace(self, to_replace=None, value=None, inplace=False, limit=None,
-                regex=False, method='pad', axis=None):
+                regex=False, method='pad'):
         return super(DataFrame, self).replace(to_replace=to_replace,
                                               value=value, inplace=inplace,
                                               limit=limit, regex=regex,
-                                              method=method, axis=axis)
+                                              method=method)
 
     @Appender(_shared_docs['shift'] % _shared_doc_kwargs)
     def shift(self, periods=1, freq=None, axis=0):

pandas/core/generic.py

@@ -5543,9 +5543,6 @@ def bfill(self, axis=None, inplace=False, limit=None, downcast=None):
 
             .. versionchanged:: 0.23.0
                 Added to DataFrame.
-        axis : None
-            .. deprecated:: 0.13.0
-               Has no effect and will be removed.
 
         See Also
         --------
@@ -5753,15 +5750,11 @@ def bfill(self, axis=None, inplace=False, limit=None, downcast=None):
 
     @Appender(_shared_docs['replace'] % _shared_doc_kwargs)
     def replace(self, to_replace=None, value=None, inplace=False, limit=None,
-                regex=False, method='pad', axis=None):
+                regex=False, method='pad'):
         inplace = validate_bool_kwarg(inplace, 'inplace')
         if not is_bool(regex) and to_replace is not None:
             raise AssertionError("'to_replace' must be 'None' if 'regex' is "
                                  "not a bool")
-        if axis is not None:
-            warnings.warn('the "axis" argument is deprecated '
-                          'and will be removed in'
-                          'v0.13; this argument has no effect')
 
         self._consolidate_inplace()
 

pandas/core/series.py

@@ -3423,11 +3423,10 @@ def fillna(self, value=None, method=None, axis=None, inplace=False,
 
     @Appender(generic._shared_docs['replace'] % _shared_doc_kwargs)
     def replace(self, to_replace=None, value=None, inplace=False, limit=None,
-                regex=False, method='pad', axis=None):
+                regex=False, method='pad'):
         return super(Series, self).replace(to_replace=to_replace, value=value,
                                            inplace=inplace, limit=limit,
-                                           regex=regex, method=method,
-                                           axis=axis)
+                                           regex=regex, method=method)
 
     @Appender(generic._shared_docs['shift'] % _shared_doc_kwargs)
     def shift(self, periods=1, freq=None, axis=0):