Graphviz の秘密を明らかにする: 理解を向上させるグラフィカル ツール

# Debian/Ubuntu
sudo apt-get install graphviz

# Fedora/CentOS
sudo yum install graphviz

# macOS
brew install graphviz

digraph G {
  node1 [label="节点 1"];
  node2 [label="节点 2"];

  node1 -> node2;
}

import graphviz

class Node:
    def __init__(self, value):
        self.value = value
        self.visited = False

class Graph:
    def __init__(self):
        self.nodes = {}

    def add_node(self, value):
        if value not in self.nodes:
            self.nodes[value] = Node(value)

    def add_edge(self, node1, node2):
        self.nodes[node1].neighbors.add(node2)
        self.nodes[node2].neighbors.add(node1)

    def bfs(self, start):
        queue = [start]
        start.visited = True

        while queue:
            current = queue.pop(0)
            print(current.value)

            for neighbor in current.neighbors:
                if not neighbor.visited:
                    neighbor.visited = True
                    queue.append(neighbor)

def main():
    graph = Graph()
    graph.add_node("A")
    graph.add_node("B")
    graph.add_node("C")
    graph.add_node("D")
    graph.add_edge("A", "B")
    graph.add_edge("A", "C")
    graph.add_edge("B", "D")
    graph.add_edge("C", "D")

    dot = graphviz.Digraph(format='png')

    for node in graph.nodes.values():
        dot.node(node.value)

    for node in graph.nodes.values():
        for neighbor in node.neighbors:
            dot.edge(node.value, neighbor.value)

    dot.render('bfs')

if __name__ == "__main__":
    main()