write_graph6_file(G, f, nodes=None, header=True)

Notes

The function writes a newline character after writing the encoding of the graph.

The format does not support edge or node labels, parallel edges or self loops. If self loops are present they are silently ignored.

Parameters

G : Graph (undirected)

f : file-like object

The file to write.

nodes: list or iterable :

Nodes are labeled 0...n-1 in the order provided. If None the ordering given by G.nodes() is used.

header: bool :

If True add '>>graph6<<' string to head of data

Raises

NetworkXNotImplemented

If the graph is directed or is a multigraph.

ValueError

If the graph has at least 2 ** 36 nodes; the graph6 format is only defined for graphs of order less than 2 ** 36 .

Write a simple undirected graph to a file-like object in graph6 format.

See Also

from_graph6_bytes

read_graph6

Examples

>>> import tempfile
>>> with tempfile.NamedTemporaryFile() as f:
...     nx.write_graph6(nx.path_graph(2), f)
...     _ = f.seek(0)
...     print(f.read())
b'>>graph6<<A_\n'

See :

Local connectivity graph

Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.

Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)

SVG is more flexible but power hungry; and does not scale well to 50 + nodes.

All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them

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GitHub : /networkx/readwrite/graph6.py#309
type: <class 'function'>
Commit: