def get_subgraph(self, name):
match = list()<EOL>if name in self.obj_dict['<STR_LIT>']:<EOL><INDENT>sgraphs_obj_dict = self.obj_dict['<STR_LIT>'].get( name )<EOL>for obj_dict_list in sgraphs_obj_dict:<EOL><INDENT>match.append( Subgraph( obj_dict = obj_dict_list ) )<EOL><DEDENT><DEDENT>return match<EOL>
Retrieved a subgraph from the graph.

        Given a subgraph's name the corresponding
        Subgraph instance will be returned.

        If one or more subgraphs exist with the same name, a list of
        Subgraph instances is returned.
        An empty list is returned otherwise.