節點之間的兩條邊

Question

我用權重做了一個圖表。 我在 Node1 和 Node2 之間有兩條邊。 我可以畫出它們的重量，但我看不到兩條邊。 如何繪制兩條邊？ 它們的權重為 1 和 2。（Node2 到 Node1 = 1，Node1 到 Node2 = 2）

我的代碼：

import networkx as nx
from networkx.drawing.nx_agraph import write_dot
import matplotlib.pyplot as plt
G=nx.DiGraph()
i=1

#Adding nodes to graph
# "pos" is for the location of the nodes
G.add_node(0,pos=(0,5))
G.add_node(1,pos=(10,0))
G.add_node(2,pos=(5,-5))
G.add_node(3,pos=(-5,-5))
G.add_node(4,pos=(-10,0))

# Adding edges each node
G.add_edge(0,4,weight=2)
G.add_edge(0,1,weight=5)
G.add_edge(0,2,weight=3)

G.add_edge(1,3,weight=6)
G.add_edge(1,2,weight=2)

G.add_edge(2,1,weight=1,)
G.add_edge(2,3,weight=2)

G.add_edge(4,3,weight=4)
G.add_edge(4,2,weight=10)
G.add_edge(4,1,weight=6)


pos=nx.get_node_attributes(G,'pos')

edge_labels=dict([((u,v,),d['weight'])
             for u,v,d in G.edges(data=True)])
nx.draw_networkx_edge_labels(G, pos, edge_labels=edge_labels, label_pos=0.2, font_size=9)



list = [nx.dijkstra_path(G,4,1,6),nx.dijkstra_path(G,4,2,10),nx.dijkstra_path(G,4,3,4)]
nx.draw(G, pos, with_labels=True)


print("--------------------------------------")
print((list))
print("--------------------------------------")
print("Shortest path btwn 4-1:",nx.dijkstra_path(G,4,1),"=",nx.dijkstra_path_length(G,4,1))
print("Shortest path btwn 4-2:",nx.dijkstra_path(G,4,2),"=",nx.dijkstra_path_length(G,4,2))
print("Shortest path btwn 4-3:",nx.dijkstra_path(G,4,3),"=",nx.dijkstra_path_length(G,4,3))
print("--------------------------------------")
labels = nx.get_edge_attributes(G,'weight', )
print("Before removing Node 1: ",G.nodes)

#nx.draw_networkx_edge_labels(G,pos,edge_labels=labels, )


plt.show()
plt.clf() #Clears the current figure.

G.remove_node(1) # this line of code remove only vertex, don't forget also remove weights
labels = nx.get_edge_attributes(G,'weight', )
pos=nx.get_node_attributes(G,'pos')


print("--------------------------------------")
print("After removing Node1: ",G.nodes)
print("--------------------------------------")
nx.draw_networkx_edge_labels(G,pos,edge_labels=labels, )
nx.draw(G, pos, with_labels=True)
plt.axis('off')
plt.show()

我的圖：

如何為 Node1 和 Node2 之間的每個權重創建一條邊？

編輯： 在 Python 中以分別顯示所有邊的方式繪制有向圖我嘗試使用nx.draw(G, connectionstyle='arc3, rad = 0.1')但我得到了錯誤。

Answer 1

現在我再次檢查，發現我把 function 放錯了地方。 我將在下面回答。

nx.draw(G,pos, connectionstyle='arc3, rad = 0.09',with_labels=True ) `helped to solve the problem.` 

import networkx as nx
from networkx.drawing.nx_agraph import write_dot
import matplotlib.pyplot as plt
G=nx.DiGraph()
i=1

#Adding nodes to graph
# "pos" is for the location of the nodes
G.add_node(0,pos=(0,5))
G.add_node(1,pos=(10,0))
G.add_node(2,pos=(5,-5))
G.add_node(3,pos=(-5,-5))
G.add_node(4,pos=(-10,0))

# Adding edges each node
G.add_edge(0,4,weight=2)
G.add_edge(0,1,weight=5)
G.add_edge(0,2,weight=3)

G.add_edge(1,3,weight=6)
G.add_edge(1,2,weight=2)

G.add_edge(2,1,weight=1,)
G.add_edge(2,3,weight=2)

G.add_edge(4,3,weight=4)
G.add_edge(4,2,weight=10)
G.add_edge(4,1,weight=6)


pos=nx.get_node_attributes(G,'pos')

edge_labels=dict([((u,v,),d['weight'])
             for u,v,d in G.edges(data=True)])
nx.draw_networkx_edge_labels(G, pos, edge_labels=edge_labels, label_pos=0.2, font_size=9)



list = [nx.dijkstra_path(G,4,1,6),nx.dijkstra_path(G,4,2,10),nx.dijkstra_path(G,4,3,4)]
# PRINTING BOTH EDGES BETWEEN TWO NODES
nx.draw(G,pos, connectionstyle='arc3, rad = 0.09',with_labels=True )


print("--------------------------------------")
print((list))
print("--------------------------------------")
print("Shortest path btwn 4-1:",nx.dijkstra_path(G,4,1),"=",nx.dijkstra_path_length(G,4,1))
print("Shortest path btwn 4-2:",nx.dijkstra_path(G,4,2),"=",nx.dijkstra_path_length(G,4,2))
print("Shortest path btwn 4-3:",nx.dijkstra_path(G,4,3),"=",nx.dijkstra_path_length(G,4,3))
print("--------------------------------------")
labels = nx.get_edge_attributes(G,'weight', )
print("Before removing Node 1: ",G.nodes)




plt.show()
plt.clf() #Clears the current figure.

G.remove_node(1) # this line of code remove only vertex, don't forget also remove weights
labels = nx.get_edge_attributes(G,'weight', )
pos=nx.get_node_attributes(G,'pos')


print("--------------------------------------")
print("After removing Node1: ",G.nodes)
print("--------------------------------------")
nx.draw_networkx_edge_labels(G,pos,edge_labels=labels, )
nx.draw(G, pos, with_labels=True)
plt.axis('off')
plt.show()