Exemplo n.º 1
0
def strongly_connected_components(filepath):
    """
    Method to calculate the strongly connected
    components in the graph and write it in an output file
    Expects: filepath (filename is sufficient if file is in the same
        directory else absolute file path is required)
    Effects: Generates the output file with name output_filename
    in the same directory
    """
    generator = GraphGenerator(filepath)
    graph = generator.graph_from_text_file()
    dfs_1 = DFS(graph)
    dfs_1.dfs()
    # graph after first run of dfs with vertices ordered by increasing
    # finishing time.
    dfs_1.dfs_graph_from_call_stack()
    # graph after transpose of the original graph
    dfs_1_trans_graph = dfs_1.dfs_graph.transpose()
    # # Second run of dfs on transposed graph
    dfs_2 = DFS(dfs_1_trans_graph)
    dfs_2.dfs()
    dfs_2.dfs_graph_from_call_stack()
    filename = filepath.split("/")[-1]
    file_obj = open("output_" + filename, "w")
    write_dfs_components(file_obj, dfs_2.dfs_forest)
    file_obj.close()
Exemplo n.º 2
0
def run_tests(filepath):
    """
    runs all the tests for the program
    """
    generator = GraphGenerator(filepath)
    graph = generator.graph_from_text_file()
    # test for object references in original graph

    print "TEST: Testing object reference on original graph"
    print object_references(graph)

    dfs_1 = DFS(graph)
    dfs_1.dfs()

    # graph after first run of dfs with vertices ordered by increasing
    # finishing time.
    dfs_1.dfs_graph_from_call_stack()

    # test for object reference after first dfs run
    print "TEST: Testing object reference on dfs 1 graph"
    print object_references(dfs_1.dfs_graph)

    print "Printing DFS 1 Graph"
    print dfs_1.dfs_graph

    print "*****************************************"
    # graph after transpose of the original graph
    dfs_1_trans_graph = dfs_1.dfs_graph.transpose()

    print "Printing transpose of DFS 1 Graph"
    print dfs_1_trans_graph

    print "*****************************************"

    # # Second run of dfs on transposed graph
    dfs_2 = DFS(dfs_1_trans_graph)
    dfs_2.dfs()
    dfs_2.dfs_graph_from_call_stack()
    # test for object reference after first dfs run

    print "TEST: Testing object reference on dfs 2 graph"
    print object_references(dfs_2.dfs_graph)

    print "Printing DFS 2 Graph"
    print dfs_2.dfs_graph

    print "*****************************************"

    print "Printing DFS components"

    print "*****************************************"
    print_dfs_components(dfs_2.dfs_forest)