write_weighted_edgelist(G, path, comments='#', delimiter=' ', encoding='utf-8')[source]#

Write graph G as a list of edges with numeric weights.


A NetworkX graph

pathfile or string

File or filename to write. If a file is provided, it must be opened in ‘wb’ mode. Filenames ending in .gz or .bz2 will be compressed.

commentsstring, optional

The character used to indicate the start of a comment

delimiterstring, optional

The string used to separate values. The default is whitespace.

encoding: string, optional

Specify which encoding to use when writing file.


>>> G = nx.Graph()
>>> G.add_edge(1, 2, weight=7)
>>> nx.write_weighted_edgelist(G, "test.weighted.edgelist")