Here is My Python Code is given below:-
import networkx as nx
import matplotlib.pyplot as plt
from random import choice
g=nx.Graph()
city_set=['Delhi','Lucknow','Indore','Kolkata','Hyderabad','Chennai',
'Tivandrum','Banglore','Pune','Mumbai','Surat','Ahmedabad','Jaipur']
for each in city_set:
g.add_node(each)
costs=[]
value =100
while(value<=2000):
costs.append(value)
value=value+70
while(g.number_of_edges()<24):
c1=choice(g.nodes())
c2=choice(g.nodes())
if c1!=c2 and g.has_edge(c1,c2)==0:
w=choice(costs)
g.add_edge(c1,c2,weight=w)
nx.draw(g,with_labels=1)
plt.show(g)
and while compiling the code I got the error stated below:-
$ python cities.py
Traceback (most recent call last):
File "cities.py", line 22, in <module>
c1=choice(g.nodes())
File "/usr/lib/python2.7/random.py", line 277, in choice
return seq[int(self.random() * len(seq))] # raises IndexError if seq
is empty
File "/usr/local/lib/python2.7/dist-
packages/networkx/classes/reportviews.py", line 178, in __getitem__
return self._nodes[n]
KeyError: 7
I also created vitual enviourment of Pyhton but again it shows the smae error. Also, I tried finding some stuff on Google and check for the solution but no one has similar problem like this.
答案 0 :(得分:1)
更改
c1=choice(g.nodes())
c2=choice(g.nodes())
进入
c1=choice(list(g))
c2=choice(list(g))
应该工作。
g.nodes()
返回一个NodeView
,而不是节点列表。
答案 1 :(得分:1)
import random
import networkx as nx
costs = []
value=100
while(value<=2000):
costs.append(value)
value+=100
print (costs)
while(G.number_of_edges()<16):
c1 = random.choice(list(G.nodes()))
c2 = random.choice(list(G.nodes()))
if c1!=c2 and G.has_edge(c1,c2)==0:
w= random.choice(costs)
G.add_edge(c1,c2,weight = w)
请尝试使用此代码,因为视频中显示的随机语法存在一些错误。我已经粘贴了我的代码,对其进行了测试。
G.nodes()需要返回一个列表,但是这里返回的是NodeView。因此,将G.nodes()更改为list(G.nodes())