问题描述
我正在尝试弄清如何使用NLTK的无识别符版本的实体识别器.我下载了 http://nlp.stanford.edu/software/stanford -ner-2015-04-20.zip 并将其放置在python的site-packages文件夹中.然后，我下载了 http://nlp.stanford. edu/software/stanford-corenlp-caseless-2015-04-20-models.jar 并将其放在文件夹中.然后我在NLTK中运行了这段代码
I am trying to figure out how to use the caseless version of the entity recognizer from NLTK. I downloaded http://nlp.stanford.edu/software/stanford-ner-2015-04-20.zip and placed it in the site-packages folder of python. Then I downloaded http://nlp.stanford.edu/software/stanford-corenlp-caseless-2015-04-20-models.jar and placed it in the folder. Then I ran this code in NLTK
from nltk.tag.stanford import NERTagger
english_nertagger = NERTagger(‘/home/anaconda/lib/python2.7/site-packages/stanford-ner-2015-04-20/classifiers/english.conll.4class.distsim.crf.ser.gz’, ‘/home/anaconda/lib/python2.7/site-packages/stanford-ner-2015-04-20/stanford-corenlp-caseless-2015-04-20-models.jar’)
但是当我运行它时:
english_nertagger.tag(‘Rami Eid is studying at stony brook university in NY’.split())
我得到一个错误:
Error: Could not find or load main class edu.stanford.nlp.ie.crf.CRFClassifier
任何有经验的帮助都将受到赞赏！
Any help if you have experience is appreciated!
P.S.我可以使非不区分大小写的版本正常工作，但我发现在分析搜索查询时，用户几乎不会将单词大写，并且非不区分大小写的版本似乎完全遗漏了单词.
P.S. I can get the non-caseless version working fine but I find that when analysing search queries, users hardly ever capitalize words and the non-caseless version appears to completely miss words if they are not capitalized.
推荐答案
StanfordNERTagger的第二个参数是斯坦福标记jar文件的路径，而不是模型的路径.因此，将其更改为stanford-ner.jar(当然，并将其放置在此处).
The second parameter of StanfordNERTagger is the path to the stanford tagger jar file, not the path to the model. So, change it to stanford-ner.jar (and place it there, of course).
另外，您似乎应该选择english.conll.4class.caseless.distsim.crf.ser.gz(来自stanford-corenlp-caseless-2015-04-20-models.jar)而不是english.conll.4class.distsim.crf.ser.gz
Also it seems that you should choose english.conll.4class.caseless.distsim.crf.ser.gz (from stanford-corenlp-caseless-2015-04-20-models.jar) instead of english.conll.4class.distsim.crf.ser.gz
因此请尝试以下操作:
english_nertagger = StanfordNERTagger(‘/home/anaconda/lib/python2.7/site-packages/stanford-ner-2015-04-20/classifiers/english.conll.4class.caseless.distsim.crf.ser.gz’, ‘/home/anaconda/lib/python2.7/site-packages/stanford-ner-2015-04-20/stanford-ner.jar’)
已更新. NERTagger已重命名为StanfordNERTagger
Upd. NERTagger has been renamed to StanfordNERTagger
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