def cut_edges(graph):
    """
    Return the cut-edges of the given graph.
    
    A cut edge, or bridge, is an edge of a graph whose removal increases the number of connected
    components in the graph.
    
    @type  graph: graph, hypergraph
    @param graph: Graph.
    
    @rtype:  list
    @return: List of cut-edges.
    """
    recursionlimit = getrecursionlimit()
    setrecursionlimit(max(len(graph.nodes())*2,recursionlimit))

    # Dispatch if we have a hypergraph
    if 'hypergraph' == graph.__class__.__name__:
        return _cut_hyperedges(graph)

    pre = {}    # Pre-ordering
    low = {}    # Lowest pre[] reachable from this node going down the spanning tree + one backedge
    spanning_tree = {}
    reply = []
    pre[None] = 0

    for each in graph:
        if (pre not in each):
            spanning_tree[each] = None
            _cut_dfs(graph, spanning_tree, pre, low, reply, each)
    
    setrecursionlimit(recursionlimit)
    return reply
dataset/ETHPy150Open nerdvegas/rez/src/rez/vendor/pygraph/algorithms/accessibility.py/cut_edges/swapped operands of `not in`