python - 属性错误: 'module' object has no attribute in NetworkX

Question

我通过sudo pip install networkx --upgrade升级了networkx现在我的networkx是最新的。

$ pip freeze | grep 'networkx'
networkx==1.11

但是我遇到了问题:AttributeError: 'module' object has no attribute 'min_weighted_dominating_set'运行以下代码时。

import networkx as nx
G = nx.path_graph(5)
s = nx.min_weighted_dominating_set(G, weight=None)

PS:min_weighted_dominating_set 描述here 。

Answer 1

尝试

import networkx as nx
from networkx.algorithms.approximation import min_weighted_dominating_set

import networkx as nx
G = nx.path_graph(5)
s = min_weighted_dominating_set(G, weight=None)

我不确定为什么它需要特殊导入...我想知道这对于networkx来说是意外还是故意的。