图形化直线

Question

我正在尝试获得从右侧节点退出并从左侧进入的直线边。我曾尝试使用splines='line，但它似乎不能创建直线。下面的代码，在jupyter notebook中执行。

from graphviz import Digraph
g = Digraph('G', filename='cluster.gv')

with g.subgraph(name='cluster_0') as c:
    c.attr(style='filled', color='lightgrey')
    c.node_attr.update(style='filled', color='white')
    c.edges([('a0', 'a1'), ('a1', 'a2'), ('a2', 'a3')])
    c.attr(label='process #1')

with g.subgraph(name='cluster_1') as c:
    c.attr(color='blue')
    c.node_attr['style'] = 'filled'
    c.edges([('b0', 'b1'), ('b1', 'b2'), ('b2', 'b3')])
    c.attr(label='process #2')

g.edge('a1', 'b3',splines='line',tailport="e", headport="w", constraint='false')
g.edge('a2', 'b0',splines='line',tailport="e", headport="w", constraint='false')

g.view()

这是由以下代码生成的图形：Graph

Answer 1

我已经解决了这个问题。splines='line'的位置不正确。更正下面的代码，以防将来的用户遇到同样的问题。

g = Digraph('G', filename='cluster.gv')

with g.subgraph(name='cluster_0') as c:
    c.attr(style='filled', color='lightgrey')
    c.node_attr.update(style='filled', color='white')
    c.edges([('a0', 'a1'), ('a1', 'a2'), ('a2', 'a3')])
    c.attr(label='process #1')

with g.subgraph(name='cluster_1') as c:
    c.attr(color='blue')
    c.node_attr['style'] = 'filled'
    c.edges([('b0', 'b1'), ('b1', 'b2'), ('b2', 'b3')])
    c.attr(label='process #2')

g.attr(splines='false')
g.edge('a1', 'b3',tailport="e", headport="w", constraint='false')
g.edge('a2', 'b0',tailport="e", headport="w", constraint='false')

g.view()