parse_adjlist#

parse_adjlist(lines, comments='#', delimiter=None, create_using=None, nodetype=None)[source]#

Parse lines of a graph adjacency list representation.

Parameters:

lineslist or iterator of strings: Input data in adjlist format
create_usingNetworkX graph constructor, optional (default=nx.Graph): Graph type to create. If graph instance, then cleared before populated.
nodetypePython type, optional: Convert nodes to this type.
commentsstring, optional: Marker for comment lines
delimiterstring, optional: Separator for node labels. The default is whitespace.

Returns:

G: NetworkX graph: The graph corresponding to the lines in adjacency list format.

See also

read_adjlist

Examples

>>> lines = ["1 2 5", "2 3 4", "3 5", "4", "5"]
>>> G = nx.parse_adjlist(lines, nodetype=int)
>>> nodes = [1, 2, 3, 4, 5]
>>> all(node in G for node in nodes)
True
>>> edges = [(1, 2), (1, 5), (2, 3), (2, 4), (3, 5)]
>>> all((u, v) in G.edges() or (v, u) in G.edges() for (u, v) in edges)
True