自然语言处理基础技术工具篇之Stanfordcorenlp

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Stanfordcorenlp简介

• Stanford CoreNLP提供了一套人类语言技术工具。 支持多种自然语言处理基本功能，Stanfordcorenlp是它的一个python接口。
• 官网地址：https://stanfordnlp.github.io/CoreNLP/
  Github地址：https://github.com/stanfordnlp/CoreNLP
• Stanfordcorenlp主要功能包括分词、词性标注、命名实体识别、句法结构分析和依存分析等等。

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Stanfordcorenlp工具Demo

安装：pip install stanfordcorenlp

先下载模型，下载地址：https://nlp.stanford.edu/software/corenlp-backup-download.html

支持多种语言，这里记录一下中英文使用方法

from stanfordcorenlp import StanfordCoreNLP
zh_model = StanfordCoreNLP(r'stanford-corenlp-full-2018-02-27', lang='zh')
en_model = StanfordCoreNLP(r'stanford-corenlp-full-2018-02-27', lang='en')

zh_sentence = '我爱自然语言处理技术！'
en_sentence = 'I love natural language processing technology!'

1.分词(Tokenize)

print ('Tokenize:', zh_model.word_tokenize(zh_sentence))
print ('Tokenize:', en_model.word_tokenize(en_sentence))

Tokenize: ['我爱', '自然', '语言', '处理', '技术', '！']
Tokenize: ['I', 'love', 'natural', 'language', 'processing', 'technology', '!']

2.词性标注(Part of Speech)

print ('Part of Speech:', zh_model.pos_tag(zh_sentence))
print ('Part of Speech:', en_model.pos_tag(en_sentence))

Part of Speech: [('我爱', 'NN'), ('自然', 'AD'), ('语言', 'NN'), ('处理', 'VV'), ('技术', 'NN'), ('！', 'PU')]
Part of Speech: [('I', 'PRP'), ('love', 'VBP'), ('natural', 'JJ'), ('language', 'NN'), ('processing', 'NN'), ('technology', 'NN'), ('!', '.')]

3.命名实体识别(Named Entity)

print ('Named Entities:', zh_model.ner(zh_sentence))
print ('Named Entities:', en_model.ner(en_sentence))

Named Entities: [('我爱', 'O'), ('自然', 'O'), ('语言', 'O'), ('处理', 'O'), ('技术', 'O'), ('！', 'O')]
Named Entities: [('I', 'O'), ('love', 'O'), ('natural', 'O'), ('language', 'O'), ('processing', 'O'), ('technology', 'O'), ('!', 'O')]

4.句法成分分析(Constituency Parse)

print ('Constituency Parsing:', zh_model.parse(zh_sentence) + "\n")
print ('Constituency Parsing:', en_model.parse(en_sentence))

Constituency Parsing: (ROOT
  (IP
    (IP
      (NP (NN 我爱))
      (ADVP (AD 自然))
      (NP (NN 语言))
      (VP (VV 处理)
        (NP (NN 技术))))
    (PU ！)))

Constituency Parsing: (ROOT
  (S
    (NP (PRP I))
    (VP (VBP love)
      (NP (JJ natural) (NN language) (NN processing) (NN technology)))
    (. !)))

5.依存句法分析(Dependency Parse)

print ('Dependency:', zh_model.dependency_parse(zh_sentence))
print ('Dependency:', en_model.dependency_parse(en_sentence))

Dependency: [('ROOT', 0, 4), ('nsubj', 4, 1), ('advmod', 4, 2), ('nsubj', 4, 3), ('dobj', 4, 5), ('punct', 4, 6)]
Dependency: [('ROOT', 0, 2), ('nsubj', 2, 1), ('amod', 6, 3), ('compound', 6, 4), ('compound', 6, 5), ('dobj', 2, 6), ('punct', 2, 7)]