Python DirectedHypergraph.get_hyperedge_tail方法代码示例

# 需要导入模块: from halp.directed_hypergraph import DirectedHypergraph [as 别名]
# 或者: from halp.directed_hypergraph.DirectedHypergraph import get_hyperedge_tail [as 别名]
def test_get_hyperedge_tail():
    node_a = 'A'
    node_b = 'B'
    node_c = 'C'
    node_d = 'D'

    tail1 = set([node_a, node_b])
    head1 = set([node_c, node_d])
    frozen_tail1 = frozenset(tail1)
    frozen_head1 = frozenset(head1)

    tail2 = set([node_b, node_c])
    head2 = set([node_d, node_a])
    frozen_tail2 = frozenset(tail2)
    frozen_head2 = frozenset(head2)

    attrib = {'weight': 6, 'color': 'black'}
    common_attrib = {'sink': False}

    hyperedges = [(tail1, head1, attrib), (tail2, head2)]

    H = DirectedHypergraph()
    hyperedge_names = \
        H.add_hyperedges(hyperedges, common_attrib, color='white')

    retrieved_tail1 = H.get_hyperedge_tail('e1')
    retrieved_tail2 = H.get_hyperedge_tail('e2')
    assert retrieved_tail1 == tail1
    assert retrieved_tail2 == tail2

# 需要导入模块: from halp.directed_hypergraph import DirectedHypergraph [as 别名]
# 或者: from halp.directed_hypergraph.DirectedHypergraph import get_hyperedge_tail [as 别名]
def test_to_networkx_digraph():
    H = DirectedHypergraph()
    H.read("tests/data/basic_directed_hypergraph.txt")

    G = directed_graph_transformations.to_networkx_digraph(H)

    H_nodes = H.get_node_set()
    G_nodes = G.node.keys()

    assert H_nodes == set(G_nodes)

    H_nodes_attributes = [H.get_node_attributes(node) for node in H_nodes]
    for node in G_nodes:
        assert G.node[node] in H_nodes_attributes

    for hyperedge_id in H.hyperedge_id_iterator():
        tail_set = H.get_hyperedge_tail(hyperedge_id)
        head_set = H.get_hyperedge_head(hyperedge_id)
        for tail_node in tail_set:
            for head_node in head_set:
                assert G[tail_node][head_node]

    # Try transforming an invalid directed hypergraph
    try:
        directed_graph_transformations.to_networkx_digraph("invalid H")
        assert False
    except TypeError:
        pass
    except BaseException as e:
        assert False, e

# 需要导入模块: from halp.directed_hypergraph import DirectedHypergraph [as 别名]
# 或者: from halp.directed_hypergraph.DirectedHypergraph import get_hyperedge_tail [as 别名]
def test_read_and_write():
    # Try writing the following hypergraph to a file
    node_a = 'A'
    node_b = 'B'
    node_c = 'C'
    attrib_c = {'alt_name': 1337}
    common_attrib = {'common': True, 'source': False}

    node_list = [node_a, (node_b, {'source': True}), (node_c, attrib_c)]

    node_d = 'D'

    H = DirectedHypergraph()
    H.add_nodes(node_list, common_attrib)

    tail1 = set([node_a, node_b])
    head1 = set([node_c, node_d])
    frozen_tail1 = frozenset(tail1)
    frozen_head1 = frozenset(head1)

    tail2 = set([node_b, node_c])
    head2 = set([node_d, node_a])
    frozen_tail2 = frozenset(tail2)
    frozen_head2 = frozenset(head2)

    attrib = {'weight': 6, 'color': 'black'}
    common_attrib = {'sink': False}

    hyperedges = [(tail1, head1, attrib), (tail2, head2)]

    hyperedge_names = \
        H.add_hyperedges(hyperedges, common_attrib, color='white')

    H.write("test_directed_read_and_write.txt")

    # Try reading the hypergraph that was just written into a new hypergraph
    new_H = DirectedHypergraph()
    new_H.read("test_directed_read_and_write.txt")

    assert H._node_attributes.keys() == new_H._node_attributes.keys()

    for new_hyperedge_id in new_H.get_hyperedge_id_set():
        new_hyperedge_tail = new_H.get_hyperedge_tail(new_hyperedge_id)
        new_hyperedge_head = new_H.get_hyperedge_head(new_hyperedge_id)
        new_hyperedge_weight = new_H.get_hyperedge_weight(new_hyperedge_id)

        found_matching_hyperedge = False
        for hyperedge_id in H.get_hyperedge_id_set():
            hyperedge_tail = H.get_hyperedge_tail(hyperedge_id)
            hyperedge_head = H.get_hyperedge_head(hyperedge_id)
            hyperedge_weight = H.get_hyperedge_weight(hyperedge_id)

            if new_hyperedge_tail == hyperedge_tail and \
               new_hyperedge_head == hyperedge_head and \
               new_hyperedge_weight == hyperedge_weight:
                found_matching_hyperedge = True
                continue

        assert found_matching_hyperedge

    remove("test_directed_read_and_write.txt")

    # Try reading an invalid hypergraph file
    invalid_H = DirectedHypergraph()
    try:
        invalid_H.read("tests/data/invalid_directed_hypergraph.txt")
        assert False
    except IOError:
        pass
    except BaseException as e:
        assert False, e