Bipartite graph problems

Question

this one is my code...i dont know why the plot show like this

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)

why result look wrong?why dont show 2 set separately

if i want to draw graph like this picture...what should i do?how to use bipartite layout, can anyone help me to write this code

Answer 1

Try this:

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)

Output: