[英]AttributeError: 'ParentedTree' object has no attribute 'label'
I am basically working on parsed tree and trying to annotate tree nodes dominating empty categories(Empty node annotation).我基本上正在研究解析树并尝试注释支配空类别的树节点(空节点注释)。
I have defined a recurvsive function as below but the error that I am getting is "AttributeError: 'ParentedTree' object has no attribute 'label'".我已经定义了一个递归函数,但我得到的错误是“AttributeError:'ParentedTree'对象没有属性'label'”。
def annotateTraceNodes(node):
numChildren = len(node);
numNone=0;
for child in node:
if isinstance(child,Tree):
annotateTraceNodes(child);
if(numChildren==0 or child.label().endswith("-NONE-")):
numNone+=1;
if(numChildren==numNone):
print "setting the label";
node.set_label(node.label()+"-NONE-");
Google suggests you're using NLTK, which I'm going to assume is the case. Google 建议您使用 NLTK,我假设是这种情况。
A ParentedTree does not have a method called .label()
. ParentedTree没有名为.label
.label()
的方法。 So when you write things like this:所以当你写这样的东西时:
child.label().endswith("-NONE-")
Python doesn't know what to do. Python 不知道该怎么做。
A Tree , on the other hand, does have a .label()
method.另一方面, Tree确实有一个
.label()
方法。 Did you perhaps use a ParentedTree instead of a Tree somewhere?您是否可能在某处使用了 ParentedTree 而不是 Tree?
Could also be a versioning issue.也可能是版本问题。
Worked for me with version 3.3使用 3.3 版为我工作
pip install nltk==3.3
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