求问大神，为啥出现此类报错？

13691255250

import networkx as nx
G = nx.Graph()
G.add_edge(1, 2,{ 'weight': 20})
运行后为啥会报错？
Traceback (most recent call last):
  File "C:/Users/Administrator/Desktop/python/35.py", line 3, in <module>
    G.add_edge(1, 2,{ 'weight': 20})
TypeError: add_edge() takes 3 positional arguments but 4 were given

Twilight6

函数接受的参数个数，小于你传入的参数个数导致报错，应该因为你多传入一个参数了

把后面的字典去掉试试：

G.add_edge(1, 2)

heidern0612

TypeError: add_edge() takes 3 positional arguments but 4 were given

错误告诉你，add_edge只需要接收3个位置参数，但是你给了4个。

zkami

TypeError: add_edge() takes 3 positional arguments but 4 were given      add_edge只需要接收3个参数你给了4个

临时号

G.add_edge函数你看上去只传了3个参数,实际上传了4个参数,类方法第一个参数一定是self