Warning

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

networkx.classes.function.is_empty

is_empty(G)

Returns True if G has no edges.

Parameters:G (graph) – A NetworkX graph. Returns:True if G has no edges, and False otherwise. Return type:bool

Notes

An empty graph can have nodes but not edges. The empty graph with zero nodes is known as the null graph. This is an \(O(n)\) operation where n is the number of nodes in the graph.