Returns a copy of the graph.
The copy method by default returns an independent deep copy of the graph and attributes.
If as_view is True then a view is returned instead of a copy.
All copies reproduce the graph structure, but data attributes may be handled in different ways. There are four types of copies of a graph that people might want.
Deepcopy – A “deepcopy” copies the graph structure as well as all data attributes and any objects they might contain. The entire graph object is new so that changes in the copy do not affect the original object. (see Python’s copy.deepcopy)
Fresh Data – For fresh data, the graph structure is copied while new empty data attribute dicts are created. The resulting graph is independent of the original and it has no edge, node or graph attributes. Fresh copies are not enabled. Instead use:
>>> H = G.__class__() >>> H.add_nodes_from(G) >>> H.add_edges_from(G.edges)
View – Inspired by dict-views, graph-views act like read-only versions of the original graph, providing a copy of the original structure without requiring any memory for copying the information.
See the Python copy module for more information on shallow and deep copies, https://docs.python.org/2/library/copy.html.
as_view (bool, optional (default=False)) – If True, the returned graph-view provides a read-only view of the original graph without actually copying any data.
G – A copy of the graph.
- Return type
return a directed copy of the graph.
>>> G = nx.path_graph(4) # or DiGraph, MultiGraph, MultiDiGraph, etc >>> H = G.copy()