default_index accepts additional keyword arguments

Author: minggli

pandas/core/indexes/base.py

@@ -5087,6 +5087,6 @@ def _validate_join_method(method):
         raise ValueError('do not recognize join method %s' % method)
 
 
-def default_index(n):
+def default_index(n, **kwargs):
     from pandas.core.index import RangeIndex
-    return RangeIndex(0, n, name=None)
+    return RangeIndex(0, n, **kwargs)