NLTK:为什么nltk无法识别斯坦福大学的CLASSPATH变量? [英] NLTK: why does nltk not recognize the CLASSPATH variable for stanford-ner?

问题描述

这是我的代码

from nltk.tag import StanfordNERTagger
st = StanfordNERTagger('english.all.3class.distsim.crf.ser.gz')

我得到

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

这是我的.bashrc在ubuntu中的样子

This is what my .bashrc looks like in ubuntu

export CLASSPATH=/home/wolfgang/Downloads/stanford-ner-2015-04-20/stanford-ner-3.5.2.jar
export STANFORD_MODELS=/home/wolfgang/Downloads/stanford-ner-2015-04-20/classifiers

此外，我尝试以此方式在python中打印环境变量

Also, i tried printing the environmental variable in python this way

import os
os.environ.get('CLASSPATH')

我会收到

'/home/wolfgang/Downloads/stanford-ner-2015-04-20/stanford-ner-3.5.2.jar'

因此变量正在被设置！

那怎么了?

为什么nntk不会认出我的环境变量?

Why doe'snt nltk recognize my environmental variables?

推荐答案

将.jar文件和环境变量从stanford-ner-3.5.2.jar更改为stanford-ner.jar

change the .jar file and the environmental variable from stanford-ner-3.5.2.jar to stanford-ner.jar

显然NLTK在nltk_internals.py中有一个name_pattern变量，如果它与值stanford-ner.jar

apparently NLTK has a name_pattern variable in nltk_internals.py which only accepts the CLASSPATH if it matches a regex of the value stanford-ner.jar

这篇关于NLTK:为什么nltk无法识别斯坦福大学的CLASSPATH变量?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！