二分图问题

Question

这是我的代码...我不知道为什么剧情会这样显示

import networkx as nx
import matplotlib.pyplot as plt
import random
from networkx.algorithms import bipartite
B = nx.Graph()
B.add_nodes_from([1, 2, 3, 4], bipartite=0)
B.add_nodes_from(["a", "b", "c"], bipartite=1)
B.add_edges_from([(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c"), (4, "a")])
nx.draw_networkx(B)
plt.show(B)

为什么结果看起来不对？为什么不单独显示 2 组

如果我想画这张图……我该怎么办？如何使用二分布局，谁能帮我写这段代码

Answer 1

试试这个：

import networkx as nx
import matplotlib.pyplot as plt
import random
from networkx.algorithms import bipartite
B = nx.Graph()
n = [1, 2, 3, 4]
l = [*'abc']
B.add_nodes_from(n, bipartite=0)
B.add_nodes_from(l, bipartite=1)
B.add_edges_from([(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c"), (4, "a")])
pos = dict()
pos.update( (n, (1, i)) for i, n in enumerate(n) ) 
pos.update( (n, (2, i)) for i, n in enumerate(l) ) 

nx.draw_networkx(B, pos=pos)
nx.draw_networkx_nodes(B, pos=pos, nodelist=n, node_color='G')
nx.draw_networkx_nodes(B,  node_shape='s', pos=pos, nodelist=l, node_color='r')

nx.draw_networkx_labels(B, pos, font_color='white',
                        labels={i:i for i in l})

plt.axis('off')
plt.show(B)

输出：