NameError: name 'ne_chunk' is not defined

Question

我目前正在使用 NLTK 学习命名实体识别。这是我的代码：

from nltk.chunk import conlltags2tree, tree2conlltags
from pprint import pprint
iob_tagged = tree2conlltags(cs)
pprint(iob_tagged)

ne_tree = ne_chunk(pos_tag(word_tokenize(ex)))
print(ne_tree)

它给我一个错误：

NameError Traceback (most recent call last) in ----> 1 ne_tree = ne_chunk(pos_tag(word_tokenize(ex))) 2 print(ne_tree)

NameError: name 'ne_chunk' is not defined

我已经尝试过 NLTK 的其他示例，只要它有 ne_chunk 它也会给出错误。你能帮我么？我正在使用 Ubuntu 18.04 和 python 3.7.1

Answer 1

您需要下载以下软件包：命名实体分块器将为您提供包含块和标签的树。

 # nltk for NER-tagging
 import nltk
 from nltk.corpus import conll2000
 from nltk.chunk import conlltags2tree, tree2conlltags
 from nltk.chunk import ne_chunk
 from nltk import pos_tag

 sentence = "Clement and Mathieu are working at Apple."
 ne_tree = ne_chunk(pos_tag(word_tokenize(sentence)))

Answer 2

它对我有用，谢谢@thrinadh

    import nltk
    from nltk.corpus import conll2000
    from nltk.chunk import conlltags2tree, tree2conlltags
    from nltk.chunk import ne_chunk
    from nltk import pos_tag

    sentence = "Clement and Mathieu are working at Apple."
    ne_tree = ne_chunk(pos_tag(word_tokenize(sentence)))

NameError: name 'ne_chunk' is not defined

NameError: name 'ne_chunk' is not defined

python

named-entity-recognition