ImagesApi.py 文件源码

def draw_graph(nodes_list):
    """Draws the graph image using Graphviz library"""

    graph = graphviz.Digraph(name='ProcessGraph', format='svg')
    graph.body.extend(['rankdir=LR'])
    graph.attr('node', style='bold')
    for node in nodes_list:
        graph.node(name=node.name, color=X11_colors[node.type])
        for successor in node.successor_list:
            graph.edge(node.name, successor.name, label=str(successor.time_value))

    try:
        graph.render(directory=render_dir)
    except RuntimeError:
        logger.warning("Can't render graphs. Check if Graphviz path is valid")