This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.
Modify graph to prevent further change by adding or removing nodes or edges.
Node and edge data can still be modified.
G : graph
A NetworkX graph
To “unfreeze” a graph you must make a copy by creating a new graph object:
>>> graph = nx.path_graph(4) >>> frozen_graph = nx.freeze(graph) >>> unfrozen_graph = nx.Graph(frozen_graph) >>> nx.is_frozen(unfrozen_graph) False
>>> G=nx.Graph() >>> G.add_path([0,1,2,3]) >>> G=nx.freeze(G) >>> try: ... G.add_edge(4,5) ... except nx.NetworkXError as e: ... print(str(e)) Frozen graph can't be modified