python - 在Python中使用元组绘制有向图

Question

我想使用元组列表绘制graphviz的有向图。

from graphviz import Digraph
from itertools import chain   

edges = [("first","sub-first"),("second","sub-second"),("sub-first","sub-second"),("third","sub-third")]
nodes = list(dict.fromkeys([ i for i in chain(*data)]))

正如您所理解的，edges 是由箭头 (x, y) 组成的元组列表。另外，节点是解压缩的边列表，没有重复项。有了这些数据，我的目标是呈现这样的图表:

Answer 1

我不完全确定您遇到了什么问题 - 首先，如果节点有边，您不需要定义节点 - 您只需将元组的边列表传递到 graphviz edges函数，它接受一个可迭代的:

from graphviz import Digraph

edges = [("first","sub-first"),("second","sub-second"),("sub-first","sub-second"),("third","sub-third")]
graph = Digraph(format='png')
graph.edges(edges)
graph.render()

输出: