Added test, added tolist to _dir_deletions, changed whatsnew and api.rst

doc/source/api.rst

@@ -324,6 +324,7 @@ Conversion
    Series.to_period
    Series.to_timestamp
    Series.tolist
+   Series.to_list
    Series.get_values
 
 
@@ -1535,6 +1536,7 @@ Conversion
    Index.map
    Index.ravel
    Index.tolist
+   Index.to_list
    Index.to_native_types
    Index.to_series
    Index.to_frame

doc/source/whatsnew/v0.24.0.rst

@@ -1072,6 +1072,7 @@ Other API Changes
 - The order of the arguments of :func:`DataFrame.to_html` and :func:`DataFrame.to_string` is rearranged to be consistent with each other. (:issue:`23614`)
 - :meth:`CategoricalIndex.reindex` now raises a ``ValueError`` if the target index is non-unique and not equal to the current index. It previously only raised if the target index was not of a categorical dtype (:issue:`23963`).
 - ``Series.tolist()`` and ``Index.tolist()`` now have an alias ``to_list`` (:issue:`8826`)
+- :func:`Series.tolist` and :func:`Index.tolist()` now have an alias ``to_list`` (:issue:`8826`)
 
 .. _whatsnew_0240.deprecations:
 

pandas/core/arrays/categorical.py

@@ -309,7 +309,7 @@ class Categorical(ExtensionArray, PandasObject):
     # ops, which raise
     __array_priority__ = 1000
     _dtype = CategoricalDtype(ordered=False)
-    _deprecations = frozenset(['labels'])
+    _deprecations = frozenset(['labels', 'tolist'])
     _typ = 'categorical'
 
     def __init__(self, values, categories=None, ordered=None, dtype=None,

pandas/core/indexes/base.py

@@ -41,6 +41,7 @@
 from pandas.core.ops import get_op_result_name, make_invalid_op
 import pandas.core.sorting as sorting
 from pandas.core.strings import StringMethods
+from pandas.core.accessor import DirNamesMixin
 
 from pandas.io.formats.printing import (
     default_pprint, format_object_attrs, format_object_summary, pprint_thing)
@@ -202,6 +203,8 @@ class Index(IndexOpsMixin, PandasObject):
     >>> pd.Index(list('abc'))
     Index(['a', 'b', 'c'], dtype='object')
     """
+    _deprecations = DirNamesMixin._deprecations | frozenset(['tolist'])
+
     # To hand over control to subclasses
     _join_precedence = 1
 

pandas/core/series.py

@@ -136,7 +136,7 @@ class Series(base.IndexOpsMixin, generic.NDFrame):
     _accessors = {'dt', 'cat', 'str', 'sparse'}
     _deprecations = generic.NDFrame._deprecations | frozenset(
         ['asobject', 'reshape', 'get_value', 'set_value',
-         'from_csv', 'valid'])
+         'from_csv', 'valid', 'tolist'])
 
     # Override cache_readonly bc Series is mutable
     hasnans = property(base.IndexOpsMixin.hasnans.func,

pandas/tests/test_base.py

@@ -1099,9 +1099,10 @@ class TestToIterable(object):
         'method',
         [
             lambda x: x.tolist(),
+            lambda x: x.to_list(),
             lambda x: list(x),
             lambda x: list(x.__iter__()),
-        ], ids=['tolist', 'list', 'iter'])
+        ], ids=['tolist', 'to_list', 'list', 'iter'])
     @pytest.mark.parametrize('typ', [Series, Index])
     def test_iterable(self, typ, method, dtype, rdtype):
         # gh-10904