如何解决如何向节点添加属性?
我一直在尝试向正在创建的该节点添加诸如name之类的属性,但收到错误消息。 error
# add name as a property to each node
# with networkX each node is a dictionary
G.add_node(tweeter_id,'name' = tweeter_name)
G.add_node(interact_id,'name' = interact_name)
这是我得到的错误。 error message
File "<ipython-input-31-55b9aecd990d>",line 28
G.add_node(tweeter_id,'name' = tweeter_name)
^
SyntaxError: expression cannot contain assignment,perhaps you meant "=="?
作为参考,这是完整的代码:
import networkx as nx
# define an empty Directed Graph
# A directed graph is a graph where edges have a direction
# in our case the edges goes from user that sent the tweet to
# the user with whom they interacted (retweeted,mentioned or quoted)
#g = nx.Graph()
G = nx.DiGraph()
# loop over all the tweets and add edges if the tweet include some interactions
for tweet in tweet_list:
# find all influencers in the tweet
tweeter,interactions = getAllInteractions(tweet)
tweeter_id,tweeter_name = tweeter
tweet_id = getTweetID(tweet)
# add an edge to the Graph for each influencer
for interaction in interactions:
interact_id,interact_name = interaction
# add edges between the two user ids
# this will create new nodes if the nodes are not already in the network
# we also add an attribute the to edge equal to the id of the tweet
G.add_edge(tweeter_id,interact_id,tweet_id=tweet_id)
# add name as a property to each node
# with networkX each node is a dictionary
G.add_node(tweeter_id,tweeter_name)
G.add_node(interact_id,interact_name)
解决方法
之所以会这样,是因为add_node
是一个函数。而且您不能将值赋给函数。
尝试时正在执行以下操作:
G.add_node(tweeter_id,'name') = tweeter_name
UPD :由于您使用的是networkx库,因此可以查看其add_node函数here
的文档。我相信您想做的是:
G.add_node(tweeter_id,attr_dict={'name': tweeter_name})
或作为Tibebes。 M指出,您也可以这样做:
G.add_node(tweeter_id,name=tweeter_name)
,
代替您的
G.add_node(tweeter_id,'name') = tweeter_name
G.add_node(interact_id,'name') = interact_name
使用
G.add_node(tweeter_id,tweeter_name)
G.add_node(interact_id,interact_name)
(假设您已为变量tweeter_name
和interact_name
分配了一些字符串)。
您可以从the documentation读到
使用关键字设置/更改节点属性:
>>> G.add_node(1,size=10) >>> G.add_node(3,weight=0.4,UTM=('13S',382871,3972649))
因此,请使用关键字参数name
来定义属性。
(注意:没有引号,否则将是str
,并会导致您遇到的SyntaxError
,因为它是对字符串文字的赋值)
执行以下操作:
# add name as a property to each node
# with networkX each node is a dictionary
G.add_node(tweeter_id,name = tweeter_name)
G.add_node(interact_id,name = interact_name)
它应该可以工作
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