NLTK找不到stanford-postagger.jar！设置类路径环境变量

Question

我正在进行一个项目，它要求我使用nltk和python标记令牌。所以我想用这个。但也有一些问题。 我浏览了许多其他已经提出的问题和其他论坛，但我仍然无法找到这个问题的答案。 问题是当我尝试执行以下操作时：

---

from nltk.tag import StanfordPOSTagger st = StanfordPOSTagger('english-bidirectional-distsim.tagger')

---

我得到以下信息：

---

    Traceback (most recent call last):

    `File "<pyshell#13>", line 1, in <module>
        st = StanfordPOSTagger('english-bidirectional-distsim.tagger')`

    `File "C:\Users\MY3\AppData\Local\Programs\Python\Python35-32\lib\site-packages\nltk-3.1-py3.5.egg\nltk\tag\stanford.py", line 131, in __init__
        super(StanfordPOSTagger, self).__init__(*args, **kwargs)`

    `File "C:\Users\MY3\AppData\Local\Programs\Python\Python35-32\lib\site-packages\nltk-3.1-py3.5.egg\nltk\tag\stanford.py", line 53, in __init__
        verbose=verbose)`

     `File "C:\Users\MY3\AppData\Local\Programs\Python\Python35-32\lib\site-packages\nltk-3.1-py3.5.egg\nltk\internals.py", line 652, in find_jar
        searchpath, url, verbose, is_regex))`

     `File "C:\Users\MY3\AppData\Local\Programs\Python\Python35-32\lib\site-packages\nltk-3.1-py3.5.egg\nltk\internals.py", line 647, in find_jar_iter
        raise LookupError('\n\n%s\n%s\n%s' % (div, msg, div))`

    LookupError: 

    ===========================================================================
      NLTK was unable to find stanford-postagger.jar! Set the CLASSPATH
      environment variable.

    ===========================================================================

我已经设置了 类路径-C:\Users\MY3\Desktop\nltk\stanford\stanford-postagger.jar 我也试过了。。

斯坦福大学模型

我也试过这样做..但没有成功 File "C:\Python27\lib\site-packages\nltk\tag\stanford.py", line 45, in __init__ env_vars=('STANFORD_MODELS',), verbose=verbose) 但这也不能解决问题。请帮助我解决这个问题。

我使用Windows 8、python 3.5和nltk3.1

Answer 1

更新

最初的答案是为斯坦福POS Tagger版本3.6.0（日期：2015-12-09）编写的

这里有一个new Version (3.7.0, released 2016-10-31)。下面是新版本的代码：

from nltk.tag import StanfordPOSTagger
from nltk import word_tokenize

# Add the jar and model via their path (instead of setting environment variables):
jar = 'your_path/stanford-postagger-full-2016-10-31/stanford-postagger.jar'
model = 'your_path/stanford-postagger-full-2016-10-31/models/english-left3words-distsim.tagger'

pos_tagger = StanfordPOSTagger(model, jar, encoding='utf8')

text = pos_tagger.tag(word_tokenize("What's the airspeed of an unladen swallow ?"))
print(text)

---

原始答案

我也遇到了同样的问题（但是使用了OSX和PyCharm），终于成功了。这是我从StanfordPOSTagger Documentation和alvas' work on the issue中拼凑出来的（非常感谢！）以下内容：

from nltk.internals import find_jars_within_path
from nltk.tag import StanfordPOSTagger
from nltk import word_tokenize

# Alternatively to setting the CLASSPATH add the jar and model via their path:
jar = '/Users/nischi/PycharmProjects/stanford-postagger-full-2015-12-09/stanford-postagger.jar'
model = '/Users/nischi/PycharmProjects/stanford-postagger-full-2015-12-09/models/english-left3words-distsim.tagger'

pos_tagger = StanfordPOSTagger(model, jar)

# Add other jars from Stanford directory
stanford_dir = pos_tagger._stanford_jar.rpartition('/')[0]
stanford_jars = find_jars_within_path(stanford_dir)
pos_tagger._stanford_jar = ':'.join(stanford_jars)

text = pos_tagger.tag(word_tokenize("What's the airspeed of an unladen swallow ?"))
print(text)

希望这有帮助。