如何删除pythonigraph中的边属性

Question

我想从python-igraph中的图形对象中删除边属性。等价的igraph R函数被巧妙地称为^{}。我在Python中找不到等价的函数/方法。。。有吗？你知道吗

如果没有，还有别的办法吗？（我尝试了一个简单的g.es['edge_attr']= []，但没有成功）。你知道吗

示例代码

g = ig.Graph.Tree(10, 2)        #Generate random graph
g_betweenness = g.betweenness() #Calculate betweenness for graph
g['betweenness'] = betweenness  #Assign betweenness as edge attribute
print(g.attributes())
g['betweenness'] = []           #Attempt to remove betweenness edge attribute (incorrect)
print(g.attributes())

输出

['betweenness']
['betweenness']

所需输出

['betweenness']
[]

Answer 1

您可能无法将其设置为空数组，但您关于直接更改EdgeSequence的直觉已经相当不错了。您只需使用Python的内部del()删除参数，下面我提供了一个最小的示例：

import igraph
# minimal graph
G = igraph.Graph()
G.add_vertices(2)
G.add_edge(0,1)

# add your property
G.es['betweenness'] = [1]

# print edge attribute (note the difference to your example)
print(G.es.attribute_names())
# output: ['weight']

# delete argument
del(G.es['weight'])

# print again
print(G.es.attribute_names())
# output: []