Create an empty graph with no nodes and no edges.

import networkx as nx
G = nx.Graph()

By definition, a Graph (opens new window) is a collection of nodes (vertices) along with identified pairs of nodes (called edges, links, etc). In NetworkX, nodes can be any hashable object e.g., a text string, an image, an XML object, another Graph, a customized node object, etc.

提示

Python’s None object should not be used as a node as it determines whether optional function arguments have been assigned in many functions.