添加边将创建重复的节点，而不是使用已添加的节点

Question

我通过向add_nodes_from函数传递对象字典来添加节点

然后我通过向add_edges_from函数传递一个列表来指定边

添加边时，它们会创建重复的节点，而不是使用之前已添加的节点

import networkx as nx
import matplotlib.pyplot as plt

from Employee import Employee

G = nx.DiGraph()

employees = {
    "John": Employee("John"),
    "Mathews": Employee("Mathews"),
    "Joseph": Employee("Joseph"),
    "Lana": Employee("Lana"),
    "Debrah": Employee("Debrah"),
    "Greg": Employee("Greg"),
    "Bob": Employee("Bob"),
    "Mary": Employee("Mary"),

}

connections = [
    (employees.get("John"), employees.get("Debrah")),
    (employees.get("John"), employees.get("Mary")),
    (employees.get("Mary"), employees.get("Greg")),
    (employees.get("Mary"), employees.get("Lana")),
    (employees.get("Mary"), employees.get("Debrah")),
    (employees.get("Mathews"), employees.get("Joseph")),
    (employees.get("Mathews"), employees.get("Debrah")),
    (employees.get("Mathews"), employees.get("Mary")),
    (employees.get("Lana"), employees.get("Debrah")),
    (employees.get("Greg"), employees.get("Bob")),

]

G.add_nodes_from(employees)

G.add_edges_from(connections)

print(G.nodes)

输出

['John', 'Mathews', 'Joseph', 'Lana', 'Debrah', 'Greg', 'Bob', 'Mary', John, Debrah, Mary, Greg, Lana, Mathews, Joseph, Bob]

Answer 1

G.add_nodes_from(employees)

这是使用dict的键添加节点（字符串）

G.add_edges_from(connections)

这是使用dict（employees）的值添加边