descriptors.py 文件源码

def __init__(self, data=None, **attr):
            self.node_dict_factory = ndf = self.node_dict_factory
            self.adjlist_dict_factory = self.adjlist_dict_factory
            self.edge_attr_dict_factory = self.edge_attr_dict_factory

            self.graph = {}   # dictionary for graph attributes
            self.node = ndf()  # empty node attribute dict
            self.adj = ndf()  # empty adjacency dict
            # attempt to load graph with data
            if data is not None:
                if isinstance(data, OrderedGraph):
                    try:
                        nx.convert.from_dict_of_dicts(
                            data.adj,
                            create_using=self,
                            multigraph_input=data.is_multigraph()
                        )
                        self.graph = data.graph.copy()
                        self.node.update((n,d.copy()) for n,d in data.node.items())
                    except:
                        raise nx.NetworkXError("Input is not a correct NetworkX graph.")
                else:
                    nx.convert.to_networkx_graph(data, create_using=self)