networkx.Graph.has_node

Graph.has_node(n)

Return True if the graph contains the node n.

Parameters:n : node

Examples

>>> G = nx.Graph()   # or DiGraph, MultiGraph, MultiDiGraph, etc
>>> G.add_path([0,1,2])
>>> print G.has_node(0)
True

It is more readable and simpler to use

>>> 0 in G
True