def queryables(self):
<EOL>return dict(<EOL>[(a.cname, a) for a in self.index_axes] +<EOL>[(self.storage_obj_type._AXIS_NAMES[axis], None)<EOL>for axis, values in self.non_index_axes] +<EOL>[(v.cname, v) for v in self.values_axes<EOL>if v.name in set(self.data_columns)]<EOL>)<EOL>
return a dict of the kinds allowable columns for this object