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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_subgraph_list(self):
 """Get the list of Subgraph instances. This method returns the list of Subgraph instances in the graph. """


        sgraph_objs = list()

        for sgraph in self.obj_dict['subgraphs']:
                obj_dict_list = self.obj_dict['subgraphs'][sgraph]
                sgraph_objs.extend(
                    [Subgraph(obj_dict=obj_d)
                     for obj_d in obj_dict_list])

        return sgraph_objs