def shuffle_relations(graph: BELGraph, percentage: Optional[str] = None) -> BELGraph:
    """Shuffle the relations.

    Useful for permutation testing.

    :param graph: A BEL graph
    :param percentage: What percentage of possible swaps to make
    """
    percentage = percentage or 0.3
    assert 0 < percentage <= 1

    n = graph.number_of_edges()
    swaps = int(percentage * n * (n - 1) / 2)

    result: BELGraph = graph.copy()

    edges = result.edges(keys=True)

    for _ in range(swaps):
        (s1, t1, k1), (s2, t2, k2) = random.sample(edges, 2)
        result[s1][t1][k1], result[s2][t2][k2] = result[s2][t2][k2], result[s1][t1][k1]

    return result
def shuffle_relations(graph: BELGraph, percentage: Optional[str] = None) -> BELGraph:
    """Shuffle the relations.

    Useful for permutation testing.

    :param graph: A BEL graph
    :param percentage: What percentage of possible swaps to make
    """
    percentage = percentage or 0.3
    assert 0 < percentage <= 1

    n = graph.number_of_edges()
    swaps = int(percentage * n * (n - 1) / 2)

    result: BELGraph = graph.copy()

    edges = result.edges(keys=True)

    for _ in range(swaps):
        (s1, t1, k1), (s2, t2, k2) = random.sample(edges, 2)
        result[s1][t1][k1], result[s2][t2][k2] = result[s2][t2][k2], result[s1][t1][k1]

    return result
def shuffle_relations ( graph : BELGraph , percentage : Optional [ str ] = None ) -> BELGraph : percentage = percentage or 0.3 assert 0 < percentage <= 1 n = graph . number_of_edges ( ) swaps = int ( percentage * n * ( n - 1 ) / 2 ) result : BELGraph = graph . copy ( ) edges = result . edges ( keys = True ) for _ in range ( swaps ) : ( s1 , t1 , k1 ) , ( s2 , t2 , k2 ) = random . sample ( edges , 2 ) result [ s1 ] [ t1 ] [ k1 ] , result [ s2 ] [ t2 ] [ k2 ] = result [ s2 ] [ t2 ] [ k2 ] , result [ s1 ] [ t1 ] [ k1 ] return result
Shuffle the relations.

    Useful for permutation testing.

    :param graph: A BEL graph
    :param percentage: What percentage of possible swaps to make
Shuffle the relations .