define instance at top level

Author: simonjayhawkins

pandas/core/api.py

@@ -67,7 +67,7 @@
 )
 from pandas.core.indexes.period import period_range
 from pandas.core.indexes.timedeltas import timedelta_range
-from pandas.core.indexing import IndexSlice
+from pandas.core.indexing import IndexSlice as _IndexSlice
 from pandas.core.series import Series
 from pandas.core.tools.datetimes import to_datetime
 from pandas.core.tools.numeric import to_numeric
@@ -79,6 +79,8 @@
 # DataFrame needs to be imported after NamedAgg to avoid a circular import
 from pandas.core.frame import DataFrame  # isort:skip
 
+IndexSlice = _IndexSlice()
+
 __all__ = [
     "array",
     "ArrowDtype",

pandas/core/indexing.py

@@ -102,7 +102,7 @@
 
 # the public IndexSlicerMaker
 @set_module("pandas")
-class _IndexSlice:
+class IndexSlice:
     """
     Create an object to more easily perform multi-index slicing.
 
@@ -149,8 +149,6 @@ def __getitem__(self, arg):
         return arg
 
 
-IndexSlice = _IndexSlice()
-
 
 class IndexingMixin:
     """