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double_edge_swap¶

double_edge_swap
(G, nswap=1, max_tries=100)[source]¶ Swap two edges in the graph while keeping the node degrees fixed.
A doubleedge swap removes two randomly chosen edges uv and xy and creates the new edges ux and vy:
uv u v becomes   xy x y
If either the edge ux or vy already exist no swap is performed and another attempt is made to find a suitable edge pair.
Parameters: G : graph
An undirected graph
nswap : integer (optional, default=1)
Number of doubleedge swaps to perform
max_tries : integer (optional)
Maximum number of attempts to swap edges
Returns: G : graph
The graph after double edge swaps.
Notes
Does not enforce any connectivity constraints.
The graph G is modified in place.