python之NLTK 无法找到 java 文件!用于斯坦福 POS 标记器_编程设计

我一直在尝试让 Stanford POS Tagger 工作一段时间。来自old SO post我发现了以下(稍作修改)代码:

stanford_dir = 'C:/Users/.../stanford-postagger-2017-06-09/' 
 
from nltk.tag import StanfordPOSTagger 
#from nltk.tag.stanford import StanfordPOSTagger # I tried it both ways 
from nltk import word_tokenize 
 
# Add the jar and model via their path (instead of setting environment variables): 
jar = stanford_dir + 'stanford-postagger.jar' 
model = stanford_dir + '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)

但是，我收到以下错误:

LookupError:  
 
=========================================================================== 
NLTK was unable to find the java file! 
Use software specific configuration paramaters or set the JAVAHOME environment variable. 
===========================================================================

我不知道它说的是什么 java 文件。我确定它找到了正确的文件，因为如果我将路径更改为不正确的内容，我会收到不同的错误:

LookupError: Could not find stanford-postagger.jar jar file at C:/Users/.../stanford-postagger-2017-06-09/sstanford-postagger.jar

缺少什么 java 文件？如何让 Stanford 词性标注器工作？

编辑:

我去了这个link for Stanford NLP on Windows并尝试:

(第二次编辑 - 添加安装程序):

import urllib.request 
import zipfile 
urllib.request.urlretrieve(r'http://nlp.stanford.edu/software/stanford-postagger-full-2015-04-20.zip', r'C:/Users/HMISYS/Downloads/stanford-postagger-full-2015-04-20.zip') 
zfile = zipfile.ZipFile(r'C:/Users/HMISYS/Downloads/stanford-postagger-full-2015-04-20.zip') 
zfile.extractall(r'C:/Users/HMISYS/Downloads/') 
# End second edit 
 
from nltk.tag.stanford import StanfordPOSTagger 
# Trying on an older version 
_model_filename = r'C:/Users/HMISYS/Downloads/stanford-postagger-full-2015-04-20/models/english-bidirectional-distsim.tagger' 
_path_to_jar = r'C:/Users/HMISYS/Downloads/stanford-postagger-full-2015-04-20/stanford-postagger.jar' 
st = StanfordPOSTagger(model_filename=_model_filename, path_to_jar=_path_to_jar) 
text = st.tag(nltk.word_tokenize("What's the airspeed of an unladen swallow ?")) 
print(text)

但是我得到了同样的错误。基于this post我使用以下设置我的路径变量:

set STANFORDTOOLSDIR=$HOME 
set CLASSPATH=$STANFORDTOOLSDIR/stanford-postagger-full-2015-04-20/stanford-postagger.jar 
set export STANFORD_MODELS=$STANFORDTOOLSDIR/stanford-postagger-full-2015-04-20/models

但是我得到这个错误:

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

请您参考如下方法:

我在我的代码中添加了以下几行并且它起作用了:

import os 
java_path = "C:/Program Files/Java/jdk1.8.0_161/bin/java.exe" 
os.environ['JAVAHOME'] = java_path