python - 在python中使用斯坦福标记器时出错

这是我的代码和错误消息：

>>> from nltk.tag.stanford import StanfordTagger
>>> st = StanfordTagger('bidirection-distsim-wsj-0-18.tagger')

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nltk/tag/stanford.py", line 42, in __init__
    verbose=verbose)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nltk/internals.py", line 597, in find_jar
    raise LookupError('\n\n%s\n%s\n%s' % (div, msg, div))
LookupError:

===========================================================================
  NLTK was unable to find ! Set the CLASSPATH environment variable.

  For more information, on , see:
    <http://nlp.stanford.edu/software>
===========================================================================

我该怎么解决？我真的想在python中使用stanford tagger
谢谢您！

最佳答案

from nltk.tag.stanford import POSTagger

st = POSTagger( < path to tagger >, < path to stanford NLP package/stanford-postagger.jar >)

包括两个参数的完整路径。
如果这行得通，那就试一个例句

st.tag('What is the airspeed of an unladen swallow ?'.split())

检查是否已将斯坦福解析器路径添加到CLASSPATH环境变量

export CLASSPATH = {CLASSPATH}: < path to stanford NLP package >

这应该管用。