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Note

This documents the development version of NetworkX. Documentation for the current release can be found here.

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networkx.classes.function.is_empty¶

is_empty(G)[source]¶

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.