export.py 文件源码

def info_list(graph):
    """Returns useful information about the graph as a list of tuples

    :param pybel.BELGraph graph: A BEL graph
    :rtype: list
    """
    number_nodes = graph.number_of_nodes()
    result = [
        ('Nodes', number_nodes),
        ('Edges', graph.number_of_edges()),
        ('Citations', count_unique_citations(graph)),
        ('Authors', count_unique_authors(graph)),
        ('Network density', nx.density(graph)),
        ('Components', nx.number_weakly_connected_components(graph)),
    ]

    try:
        result.append(('Average degree', sum(graph.in_degree().values()) / float(number_nodes)))
    except ZeroDivisionError:
        log.info('Graph has no nodes')

    if graph.warnings:
        result.append(('Compilation warnings', len(graph.warnings)))

    return result