Warning

This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.

Functions

Functional interface to graph methods and assorted utilities.

Graph

degree(G[, nbunch, weight])	Return a degree view of single node or of nbunch of nodes.
degree_histogram(G)	Return a list of the frequency of each degree value.
density(G)	Return the density of a graph.
info(G[, n])	Print short summary of information for the graph G or the node n.
create_empty_copy(G[, with_data])	Return a copy of the graph G with all of the edges removed.
is_directed(G)	Return True if graph is directed.
add_star(G, nodes, **attr)	Add a star to Graph G.
add_path(G, nodes, **attr)	Add a path to the Graph G.
add_cycle(G, nodes, **attr)	Add a cycle to the Graph G.

Nodes

nodes(G)	Return an iterator over the graph nodes.
number_of_nodes(G)	Return the number of nodes in the graph.
all_neighbors(graph, node)	Returns all of the neighbors of a node in the graph.
non_neighbors(graph, node)	Returns the non-neighbors of the node in the graph.
common_neighbors(G, u, v)	Return the common neighbors of two nodes in a graph.

Edges

edges(G[, nbunch])	Return an edge view of edges incident to nodes in nbunch.
number_of_edges(G)	Return the number of edges in the graph.
non_edges(graph)	Returns the non-existent edges in the graph.

Self loops

selfloop_edges(G[, data, keys, default])	Returns an iterator over selfloop edges.
number_of_selfloops(G)	Return the number of selfloop edges.
nodes_with_selfloops(G)	Returns an iterator over nodes with self loops.

Attributes

set_node_attributes(G, values[, name])	Sets node attributes from a given value or dictionary of values.
get_node_attributes(G, name)	Get node attributes from graph
set_edge_attributes(G, values[, name])	Sets edge attributes from a given value or dictionary of values.
get_edge_attributes(G, name)	Get edge attributes from graph

Freezing graph structure

freeze(G)	Modify graph to prevent further change by adding or removing nodes or edges.
is_frozen(G)	Return True if graph is frozen.