当节点是对象时，在networkx图中标记节点

Question

使用networkx标记图的节点很容易

import networkx as nx
import matplotlib.pyplot as plt

G1 = nx.Graph()
a = "A"
b = "B"
G1.add_nodes_from([a, b])
G1.add_edge(a, b)
nx.draw_networkx(G1) # default with_labels=True
plt.show()

如果节点是对象而不是字符串，我知道可以创建一个额外的字典并将其用于节点标签，但是可以将对象成员（ name ）直接用作标签吗？

class Breakfast:
    def __init__(self, name):
        self.name = name

spam = Breakfast("Spam")
eggs = Breakfast("Eggs")
G2 = nx.Graph()
G2.add_nodes_from([spam, eggs])
G2.add_edge(spam, eggs)
nx.draw_networkx(G2, with_labels=True)
plt.show()

Answer 1

添加一个简单的repr方法似乎可以解决问题：

class Breakfast:
    def __init__(self, name):
        self.name = name

    def __repr__(self):
        return self.name

spam = Breakfast("Spam")
eggs = Breakfast("Eggs")
G2 = nx.Graph()
G2.add_nodes_from([spam, eggs])
G2.add_edge(spam, eggs)
nx.draw_networkx(G2, with_labels=True)
plt.show()