CLN: Remove SparseList from pandas API (#18621)

Deprecated in 0.19.0.

xref gh-14007.

Author: gfyoung

doc/source/sparse.rst

@@ -85,15 +85,6 @@ can be converted back to a regular ndarray by calling ``to_dense``:
 
    sparr.to_dense()
 
-.. _sparse.list:
-
-SparseList
-----------
-
-The ``SparseList`` class has been deprecated and will be removed in a future version.
-See the `docs of a previous version <http://pandas.pydata.org/pandas-docs/version/0.18.1/sparse.html#sparselist>`__
-for documentation on ``SparseList``.
-
 
 SparseIndex objects
 -------------------

doc/source/whatsnew/v0.22.0.txt

@@ -136,6 +136,7 @@ Removal of prior version deprecations/changes
 - ``pd.tseries.util.pivot_annual`` has been  removed (deprecated since v0.19). Use ``pivot_table`` instead (:issue:`18370`)
 - ``pd.tseries.util.isleapyear`` has been removed (deprecated since v0.19). Use ``.is_leap_year`` property in Datetime-likes instead (:issue:`18370`)
 - ``pd.ordered_merge`` has been removed (deprecated since v0.19). Use ``pd.merge_ordered`` instead (:issue:`18459`)
+- The ``SparseList`` class has been removed (:issue:`14007`)
 
 .. _whatsnew_0220.performance:
 

pandas/core/sparse/api.py

@@ -1,6 +1,5 @@
 # pylint: disable=W0611
 # flake8: noqa
 from pandas.core.sparse.array import SparseArray
-from pandas.core.sparse.list import SparseList
 from pandas.core.sparse.series import SparseSeries
 from pandas.core.sparse.frame import SparseDataFrame

pandas/core/sparse/list.py

@@ -52,7 +52,7 @@ class TestPDApi(Base):
 
     # these are already deprecated; awaiting removal
     deprecated_classes = ['WidePanel', 'Panel4D', 'TimeGrouper',
-                          'SparseList', 'Expr', 'Term']
+                          'Expr', 'Term']
 
     # these should be deprecated in the future
     deprecated_classes_in_future = ['Panel']

pandas/tests/api/test_api.py

@@ -1582,13 +1582,6 @@ def assert_sp_frame_equal(left, right, check_dtype=True, exact_indices=True,
     for col in right:
         assert (col in left)
 
-
-def assert_sp_list_equal(left, right):
-    assert isinstance(left, pd.SparseList)
-    assert isinstance(right, pd.SparseList)
-
-    assert_sp_array_equal(left.to_array(), right.to_array())
-
 # -----------------------------------------------------------------------------
 # Others