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


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

Write graph G in single-line adjacency-list format to path.

Parameters :

G : NetworkX graph

path : string or file

Filename or file handle for data output. Filenames ending in .gz or .bz2 will be compressed.

comments : string, optional

Marker for comment lines

delimiter : string, optional

Separator for node labels

encoding : string, optional

Text encoding.


This format does not store graph, node, or edge data.


>>> G=nx.path_graph(4)
>>> nx.write_adjlist(G,"test.adjlist")

The path can be a filehandle or a string with the name of the file. If a filehandle is provided, it has to be opened in ‘wb’ mode.

>>> fh=open("test.adjlist",'wb')
>>> nx.write_adjlist(G, fh)