Pygraphviz Attributes

An example showing how to use the interface to the pygraphviz AGraph class to convert to and from graphviz.

Also see the pygraphviz documentation and examples at http://pygraphviz.github.io/

Out:

edges
[('1', '2', {'color': 'red'}), ('2', '3', {'color': 'red'})]
default graph attributes
{'graph': {}, 'node': {}, 'edge': {'color': ''}}
node node attributes
[('1', {}), ('2', {}), ('3', {}), ('4', {})]

import networkx as nx

# networkx graph
G = nx.Graph()
# ad edges with red color
G.add_edge(1, 2, color="red")
G.add_edge(2, 3, color="red")
# add nodes 3 and 4
G.add_node(3)
G.add_node(4)

# convert to a graphviz agraph
A = nx.nx_agraph.to_agraph(G)

# write to dot file
A.write("k5_attributes.dot")

# convert back to networkx Graph with attributes on edges and
# default attributes as dictionary data
X = nx.nx_agraph.from_agraph(A)
print("edges")
print(list(X.edges(data=True)))
print("default graph attributes")
print(X.graph)
print("node node attributes")
print(X.nodes.data(True))