DOC: change to numpydoc: use isdatadescriptor instead of isgetsetdescriptor to check attributes

This is needed to ensure .columns / .index / cached properties are recognized as an attribute

Author: jorisvandenbossche

doc/sphinxext/numpydoc/docscrape.py

@@ -613,7 +613,7 @@ def properties(self):
         return [name for name, func in inspect.getmembers(self._cls)
                 if (not name.startswith('_') and
                     (func is None or isinstance(func, property) or
-                     inspect.isgetsetdescriptor(func))
+                     inspect.isdatadescriptor(func))
                     and self._is_show_member(name))]
 
     def _is_show_member(self, name):

doc/sphinxext/numpydoc/docscrape_sphinx.py

@@ -243,7 +243,7 @@ def _str_member_list(self, name):
                 param_obj = getattr(self._obj, param, None)
                 if not (callable(param_obj)
                         or isinstance(param_obj, property)
-                        or inspect.isgetsetdescriptor(param_obj)):
+                        or inspect.isdatadescriptor(param_obj)):
                     param_obj = None
 
                 if param_obj and pydoc.getdoc(param_obj):