parse_edgelist

parse_edgelist(lines, comments='#', delimiter=None, create_using=None, nodetype=None, data=True)

Parse lines of an edge list representation of a bipartite graph.

Parameters:

lineslist or iterator of strings

Input data in edgelist format

commentsstring, optional

Marker for comment lines

delimiterstring, optional

Separator for node labels

create_using: NetworkX graph container, optional

Use given NetworkX graph for holding nodes or edges.

nodetypePython type, optional

Convert nodes to this type.

databool or list of (label,type) tuples

If False generate no edge data or if True use a dictionary representation of edge data or a list tuples specifying dictionary key names and types for edge data.

Returns:

G: NetworkX Graph

The bipartite graph corresponding to lines

Examples

Edgelist with no data:

>>> from networkx.algorithms import bipartite
>>> lines = ["1 2", "2 3", "3 4"]
>>> G = bipartite.parse_edgelist(lines, nodetype=int)
>>> sorted(G.nodes())
[1, 2, 3, 4]
>>> sorted(G.nodes(data=True))
[(1, {'bipartite': 0}), (2, {'bipartite': 0}), (3, {'bipartite': 0}), (4, {'bipartite': 1})]
>>> sorted(G.edges())
[(1, 2), (2, 3), (3, 4)]

Edgelist with data in Python dictionary representation:

>>> lines = ["1 2 {'weight':3}", "2 3 {'weight':27}", "3 4 {'weight':3.0}"]
>>> G = bipartite.parse_edgelist(lines, nodetype=int)
>>> sorted(G.nodes())
[1, 2, 3, 4]
>>> sorted(G.edges(data=True))
[(1, 2, {'weight': 3}), (2, 3, {'weight': 27}), (3, 4, {'weight': 3.0})]

Edgelist with data in a list:

>>> lines = ["1 2 3", "2 3 27", "3 4 3.0"]
>>> G = bipartite.parse_edgelist(lines, nodetype=int, data=(("weight", float),))
>>> sorted(G.nodes())
[1, 2, 3, 4]
>>> sorted(G.edges(data=True))
[(1, 2, {'weight': 3.0}), (2, 3, {'weight': 27.0}), (3, 4, {'weight': 3.0})]