DEPR: WidePanel, LongPanel -> deprecated

doc/source/whatsnew/v0.17.0.txt

@@ -665,6 +665,7 @@ Deprecations
   ``DataFrame.add(other, fill_value=0)`` and ``DataFrame.mul(other, fill_value=1.)``
   (:issue:`10735`).
 - ``TimeSeries`` deprecated in favor of ``Series`` (note that this has been alias since 0.13.0), (:issue:`10890`)
+- ``WidePanel`` deprecated in favor of ``Panel``, ``LongPanel`` in favor of ``DataFrame`` (note these have been aliases since < 0.11.0), (:issue:`10892`)
 
 .. _whatsnew_0170.prior_deprecations:
 

pandas/core/api.py

@@ -12,14 +12,12 @@
 
 from pandas.core.series import Series, TimeSeries
 from pandas.core.frame import DataFrame
-from pandas.core.panel import Panel
+from pandas.core.panel import Panel, WidePanel
 from pandas.core.panel4d import Panel4D
 from pandas.core.groupby import groupby
 from pandas.core.reshape import (pivot_simple as pivot, get_dummies,
                                  lreshape, wide_to_long)
 
-WidePanel = Panel
-
 from pandas.core.indexing import IndexSlice
 from pandas.tseries.offsets import DateOffset
 from pandas.tseries.tools import to_datetime

pandas/core/panel.py

@@ -1509,5 +1509,23 @@ def f(self, other, axis=0):
 Panel._add_aggregate_operations()
 Panel._add_numeric_operations()
 
-WidePanel = Panel
-LongPanel = DataFrame
+# legacy
+class WidePanel(Panel):
+
+    def __init__(self, *args, **kwargs):
+
+        # deprecation, #10892
+        warnings.warn("WidePanel is deprecated. Please use Panel",
+                      FutureWarning, stacklevel=2)
+
+        super(WidePanel, self).__init__(*args, **kwargs)
+
+class LongPanel(DataFrame):
+
+    def __init__(self, *args, **kwargs):
+
+        # deprecation, #10892
+        warnings.warn("LongPanel is deprecated. Please use DataFrame",
+                      FutureWarning, stacklevel=2)
+
+        super(LongPanel, self).__init__(*args, **kwargs)