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493 lines
19 KiB
Python
493 lines
19 KiB
Python
# -*- coding: utf-8 -*-
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# Natural Language Toolkit: Interface to the Stanford Parser
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#
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# Copyright (C) 2001-2019 NLTK Project
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# Author: Steven Xu <xxu@student.unimelb.edu.au>
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#
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# URL: <http://nltk.org/>
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# For license information, see LICENSE.TXT
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from __future__ import unicode_literals
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import tempfile
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import os
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import warnings
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from unittest import skip
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from subprocess import PIPE
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from six import text_type
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from nltk.internals import (
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find_jar_iter,
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config_java,
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java,
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_java_options,
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find_jars_within_path,
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)
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from nltk.parse.api import ParserI
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from nltk.parse.dependencygraph import DependencyGraph
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from nltk.tree import Tree
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_stanford_url = 'https://nlp.stanford.edu/software/lex-parser.shtml'
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class GenericStanfordParser(ParserI):
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"""Interface to the Stanford Parser"""
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_MODEL_JAR_PATTERN = r'stanford-parser-(\d+)(\.(\d+))+-models\.jar'
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_JAR = r'stanford-parser\.jar'
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_MAIN_CLASS = 'edu.stanford.nlp.parser.lexparser.LexicalizedParser'
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_USE_STDIN = False
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_DOUBLE_SPACED_OUTPUT = False
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def __init__(
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self,
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path_to_jar=None,
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path_to_models_jar=None,
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model_path='edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz',
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encoding='utf8',
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verbose=False,
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java_options='-mx4g',
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corenlp_options='',
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):
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# find the most recent code and model jar
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stanford_jar = max(
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find_jar_iter(
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self._JAR,
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path_to_jar,
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env_vars=('STANFORD_PARSER', 'STANFORD_CORENLP'),
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searchpath=(),
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url=_stanford_url,
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verbose=verbose,
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is_regex=True,
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),
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key=lambda model_path: os.path.dirname(model_path),
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)
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model_jar = max(
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find_jar_iter(
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self._MODEL_JAR_PATTERN,
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path_to_models_jar,
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env_vars=('STANFORD_MODELS', 'STANFORD_CORENLP'),
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searchpath=(),
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url=_stanford_url,
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verbose=verbose,
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is_regex=True,
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),
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key=lambda model_path: os.path.dirname(model_path),
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)
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# self._classpath = (stanford_jar, model_jar)
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# Adding logging jar files to classpath
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stanford_dir = os.path.split(stanford_jar)[0]
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self._classpath = tuple([model_jar] + find_jars_within_path(stanford_dir))
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self.model_path = model_path
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self._encoding = encoding
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self.corenlp_options = corenlp_options
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self.java_options = java_options
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def _parse_trees_output(self, output_):
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res = []
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cur_lines = []
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cur_trees = []
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blank = False
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for line in output_.splitlines(False):
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if line == '':
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if blank:
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res.append(iter(cur_trees))
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cur_trees = []
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blank = False
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elif self._DOUBLE_SPACED_OUTPUT:
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cur_trees.append(self._make_tree('\n'.join(cur_lines)))
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cur_lines = []
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blank = True
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else:
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res.append(iter([self._make_tree('\n'.join(cur_lines))]))
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cur_lines = []
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else:
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cur_lines.append(line)
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blank = False
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return iter(res)
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def parse_sents(self, sentences, verbose=False):
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"""
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Use StanfordParser to parse multiple sentences. Takes multiple sentences as a
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list where each sentence is a list of words.
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Each sentence will be automatically tagged with this StanfordParser instance's
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tagger.
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If whitespaces exists inside a token, then the token will be treated as
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separate tokens.
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:param sentences: Input sentences to parse
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:type sentences: list(list(str))
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:rtype: iter(iter(Tree))
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"""
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cmd = [
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self._MAIN_CLASS,
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'-model',
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self.model_path,
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'-sentences',
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'newline',
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'-outputFormat',
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self._OUTPUT_FORMAT,
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'-tokenized',
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'-escaper',
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'edu.stanford.nlp.process.PTBEscapingProcessor',
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]
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return self._parse_trees_output(
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self._execute(
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cmd, '\n'.join(' '.join(sentence) for sentence in sentences), verbose
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)
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)
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def raw_parse(self, sentence, verbose=False):
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"""
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Use StanfordParser to parse a sentence. Takes a sentence as a string;
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before parsing, it will be automatically tokenized and tagged by
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the Stanford Parser.
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:param sentence: Input sentence to parse
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:type sentence: str
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:rtype: iter(Tree)
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"""
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return next(self.raw_parse_sents([sentence], verbose))
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def raw_parse_sents(self, sentences, verbose=False):
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"""
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Use StanfordParser to parse multiple sentences. Takes multiple sentences as a
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list of strings.
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Each sentence will be automatically tokenized and tagged by the Stanford Parser.
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:param sentences: Input sentences to parse
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:type sentences: list(str)
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:rtype: iter(iter(Tree))
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"""
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cmd = [
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self._MAIN_CLASS,
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'-model',
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self.model_path,
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'-sentences',
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'newline',
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'-outputFormat',
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self._OUTPUT_FORMAT,
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]
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return self._parse_trees_output(
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self._execute(cmd, '\n'.join(sentences), verbose)
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)
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def tagged_parse(self, sentence, verbose=False):
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"""
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Use StanfordParser to parse a sentence. Takes a sentence as a list of
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(word, tag) tuples; the sentence must have already been tokenized and
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tagged.
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:param sentence: Input sentence to parse
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:type sentence: list(tuple(str, str))
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:rtype: iter(Tree)
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"""
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return next(self.tagged_parse_sents([sentence], verbose))
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def tagged_parse_sents(self, sentences, verbose=False):
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"""
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Use StanfordParser to parse multiple sentences. Takes multiple sentences
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where each sentence is a list of (word, tag) tuples.
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The sentences must have already been tokenized and tagged.
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:param sentences: Input sentences to parse
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:type sentences: list(list(tuple(str, str)))
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:rtype: iter(iter(Tree))
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"""
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tag_separator = '/'
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cmd = [
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self._MAIN_CLASS,
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'-model',
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self.model_path,
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'-sentences',
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'newline',
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'-outputFormat',
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self._OUTPUT_FORMAT,
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'-tokenized',
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'-tagSeparator',
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tag_separator,
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'-tokenizerFactory',
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'edu.stanford.nlp.process.WhitespaceTokenizer',
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'-tokenizerMethod',
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'newCoreLabelTokenizerFactory',
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]
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# We don't need to escape slashes as "splitting is done on the last instance of the character in the token"
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return self._parse_trees_output(
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self._execute(
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cmd,
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'\n'.join(
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' '.join(tag_separator.join(tagged) for tagged in sentence)
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for sentence in sentences
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),
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verbose,
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)
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)
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def _execute(self, cmd, input_, verbose=False):
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encoding = self._encoding
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cmd.extend(['-encoding', encoding])
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if self.corenlp_options:
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cmd.append(self.corenlp_options)
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default_options = ' '.join(_java_options)
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# Configure java.
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config_java(options=self.java_options, verbose=verbose)
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# Windows is incompatible with NamedTemporaryFile() without passing in delete=False.
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with tempfile.NamedTemporaryFile(mode='wb', delete=False) as input_file:
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# Write the actual sentences to the temporary input file
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if isinstance(input_, text_type) and encoding:
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input_ = input_.encode(encoding)
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input_file.write(input_)
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input_file.flush()
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# Run the tagger and get the output.
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if self._USE_STDIN:
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input_file.seek(0)
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stdout, stderr = java(
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cmd,
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classpath=self._classpath,
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stdin=input_file,
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stdout=PIPE,
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stderr=PIPE,
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)
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else:
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cmd.append(input_file.name)
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stdout, stderr = java(
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cmd, classpath=self._classpath, stdout=PIPE, stderr=PIPE
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)
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stdout = stdout.replace(b'\xc2\xa0', b' ')
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stdout = stdout.replace(b'\x00\xa0', b' ')
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stdout = stdout.decode(encoding)
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os.unlink(input_file.name)
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# Return java configurations to their default values.
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config_java(options=default_options, verbose=False)
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return stdout
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class StanfordParser(GenericStanfordParser):
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"""
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>>> parser=StanfordParser(
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... model_path="edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz"
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... )
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>>> list(parser.raw_parse("the quick brown fox jumps over the lazy dog")) # doctest: +NORMALIZE_WHITESPACE
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[Tree('ROOT', [Tree('NP', [Tree('NP', [Tree('DT', ['the']), Tree('JJ', ['quick']), Tree('JJ', ['brown']),
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Tree('NN', ['fox'])]), Tree('NP', [Tree('NP', [Tree('NNS', ['jumps'])]), Tree('PP', [Tree('IN', ['over']),
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Tree('NP', [Tree('DT', ['the']), Tree('JJ', ['lazy']), Tree('NN', ['dog'])])])])])])]
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>>> sum([list(dep_graphs) for dep_graphs in parser.raw_parse_sents((
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... "the quick brown fox jumps over the lazy dog",
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... "the quick grey wolf jumps over the lazy fox"
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... ))], []) # doctest: +NORMALIZE_WHITESPACE
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[Tree('ROOT', [Tree('NP', [Tree('NP', [Tree('DT', ['the']), Tree('JJ', ['quick']), Tree('JJ', ['brown']),
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Tree('NN', ['fox'])]), Tree('NP', [Tree('NP', [Tree('NNS', ['jumps'])]), Tree('PP', [Tree('IN', ['over']),
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Tree('NP', [Tree('DT', ['the']), Tree('JJ', ['lazy']), Tree('NN', ['dog'])])])])])]), Tree('ROOT', [Tree('NP',
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[Tree('NP', [Tree('DT', ['the']), Tree('JJ', ['quick']), Tree('JJ', ['grey']), Tree('NN', ['wolf'])]), Tree('NP',
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[Tree('NP', [Tree('NNS', ['jumps'])]), Tree('PP', [Tree('IN', ['over']), Tree('NP', [Tree('DT', ['the']),
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Tree('JJ', ['lazy']), Tree('NN', ['fox'])])])])])])]
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>>> sum([list(dep_graphs) for dep_graphs in parser.parse_sents((
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... "I 'm a dog".split(),
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... "This is my friends ' cat ( the tabby )".split(),
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... ))], []) # doctest: +NORMALIZE_WHITESPACE
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[Tree('ROOT', [Tree('S', [Tree('NP', [Tree('PRP', ['I'])]), Tree('VP', [Tree('VBP', ["'m"]),
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Tree('NP', [Tree('DT', ['a']), Tree('NN', ['dog'])])])])]), Tree('ROOT', [Tree('S', [Tree('NP',
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[Tree('DT', ['This'])]), Tree('VP', [Tree('VBZ', ['is']), Tree('NP', [Tree('NP', [Tree('NP', [Tree('PRP$', ['my']),
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Tree('NNS', ['friends']), Tree('POS', ["'"])]), Tree('NN', ['cat'])]), Tree('PRN', [Tree('-LRB-', [Tree('', []),
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Tree('NP', [Tree('DT', ['the']), Tree('NN', ['tabby'])]), Tree('-RRB-', [])])])])])])])]
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>>> sum([list(dep_graphs) for dep_graphs in parser.tagged_parse_sents((
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... (
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... ("The", "DT"),
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... ("quick", "JJ"),
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... ("brown", "JJ"),
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... ("fox", "NN"),
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... ("jumped", "VBD"),
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... ("over", "IN"),
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... ("the", "DT"),
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... ("lazy", "JJ"),
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... ("dog", "NN"),
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... (".", "."),
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... ),
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... ))],[]) # doctest: +NORMALIZE_WHITESPACE
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[Tree('ROOT', [Tree('S', [Tree('NP', [Tree('DT', ['The']), Tree('JJ', ['quick']), Tree('JJ', ['brown']),
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Tree('NN', ['fox'])]), Tree('VP', [Tree('VBD', ['jumped']), Tree('PP', [Tree('IN', ['over']), Tree('NP',
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[Tree('DT', ['the']), Tree('JJ', ['lazy']), Tree('NN', ['dog'])])])]), Tree('.', ['.'])])])]
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"""
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_OUTPUT_FORMAT = 'penn'
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def __init__(self, *args, **kwargs):
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warnings.warn(
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"The StanfordParser will be deprecated\n"
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"Please use \033[91mnltk.parse.corenlp.CoreNLPParser\033[0m instead.",
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DeprecationWarning,
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stacklevel=2,
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)
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super(StanfordParser, self).__init__(*args, **kwargs)
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def _make_tree(self, result):
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return Tree.fromstring(result)
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class StanfordDependencyParser(GenericStanfordParser):
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"""
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>>> dep_parser=StanfordDependencyParser(
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... model_path="edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz"
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... )
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>>> [parse.tree() for parse in dep_parser.raw_parse("The quick brown fox jumps over the lazy dog.")] # doctest: +NORMALIZE_WHITESPACE
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[Tree('jumps', [Tree('fox', ['The', 'quick', 'brown']), Tree('dog', ['over', 'the', 'lazy'])])]
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>>> [list(parse.triples()) for parse in dep_parser.raw_parse("The quick brown fox jumps over the lazy dog.")] # doctest: +NORMALIZE_WHITESPACE
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[[((u'jumps', u'VBZ'), u'nsubj', (u'fox', u'NN')), ((u'fox', u'NN'), u'det', (u'The', u'DT')),
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((u'fox', u'NN'), u'amod', (u'quick', u'JJ')), ((u'fox', u'NN'), u'amod', (u'brown', u'JJ')),
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((u'jumps', u'VBZ'), u'nmod', (u'dog', u'NN')), ((u'dog', u'NN'), u'case', (u'over', u'IN')),
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((u'dog', u'NN'), u'det', (u'the', u'DT')), ((u'dog', u'NN'), u'amod', (u'lazy', u'JJ'))]]
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>>> sum([[parse.tree() for parse in dep_graphs] for dep_graphs in dep_parser.raw_parse_sents((
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... "The quick brown fox jumps over the lazy dog.",
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... "The quick grey wolf jumps over the lazy fox."
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... ))], []) # doctest: +NORMALIZE_WHITESPACE
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[Tree('jumps', [Tree('fox', ['The', 'quick', 'brown']), Tree('dog', ['over', 'the', 'lazy'])]),
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Tree('jumps', [Tree('wolf', ['The', 'quick', 'grey']), Tree('fox', ['over', 'the', 'lazy'])])]
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>>> sum([[parse.tree() for parse in dep_graphs] for dep_graphs in dep_parser.parse_sents((
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... "I 'm a dog".split(),
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... "This is my friends ' cat ( the tabby )".split(),
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... ))], []) # doctest: +NORMALIZE_WHITESPACE
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[Tree('dog', ['I', "'m", 'a']), Tree('cat', ['This', 'is', Tree('friends', ['my', "'"]), Tree('tabby', ['the'])])]
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>>> sum([[list(parse.triples()) for parse in dep_graphs] for dep_graphs in dep_parser.tagged_parse_sents((
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... (
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... ("The", "DT"),
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... ("quick", "JJ"),
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... ("brown", "JJ"),
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... ("fox", "NN"),
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... ("jumped", "VBD"),
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... ("over", "IN"),
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... ("the", "DT"),
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... ("lazy", "JJ"),
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... ("dog", "NN"),
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... (".", "."),
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... ),
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... ))],[]) # doctest: +NORMALIZE_WHITESPACE
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[[((u'jumped', u'VBD'), u'nsubj', (u'fox', u'NN')), ((u'fox', u'NN'), u'det', (u'The', u'DT')),
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((u'fox', u'NN'), u'amod', (u'quick', u'JJ')), ((u'fox', u'NN'), u'amod', (u'brown', u'JJ')),
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((u'jumped', u'VBD'), u'nmod', (u'dog', u'NN')), ((u'dog', u'NN'), u'case', (u'over', u'IN')),
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((u'dog', u'NN'), u'det', (u'the', u'DT')), ((u'dog', u'NN'), u'amod', (u'lazy', u'JJ'))]]
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"""
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_OUTPUT_FORMAT = 'conll2007'
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def __init__(self, *args, **kwargs):
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warnings.warn(
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"The StanfordDependencyParser will be deprecated\n"
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"Please use \033[91mnltk.parse.corenlp.CoreNLPDependencyParser\033[0m instead.",
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DeprecationWarning,
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stacklevel=2,
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)
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super(StanfordDependencyParser, self).__init__(*args, **kwargs)
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def _make_tree(self, result):
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return DependencyGraph(result, top_relation_label='root')
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|
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class StanfordNeuralDependencyParser(GenericStanfordParser):
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'''
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>>> from nltk.parse.stanford import StanfordNeuralDependencyParser
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>>> dep_parser=StanfordNeuralDependencyParser(java_options='-mx4g')
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>>> [parse.tree() for parse in dep_parser.raw_parse("The quick brown fox jumps over the lazy dog.")] # doctest: +NORMALIZE_WHITESPACE
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[Tree('jumps', [Tree('fox', ['The', 'quick', 'brown']), Tree('dog', ['over', 'the', 'lazy']), '.'])]
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>>> [list(parse.triples()) for parse in dep_parser.raw_parse("The quick brown fox jumps over the lazy dog.")] # doctest: +NORMALIZE_WHITESPACE
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[[((u'jumps', u'VBZ'), u'nsubj', (u'fox', u'NN')), ((u'fox', u'NN'), u'det',
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(u'The', u'DT')), ((u'fox', u'NN'), u'amod', (u'quick', u'JJ')), ((u'fox', u'NN'),
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u'amod', (u'brown', u'JJ')), ((u'jumps', u'VBZ'), u'nmod', (u'dog', u'NN')),
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((u'dog', u'NN'), u'case', (u'over', u'IN')), ((u'dog', u'NN'), u'det',
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(u'the', u'DT')), ((u'dog', u'NN'), u'amod', (u'lazy', u'JJ')), ((u'jumps', u'VBZ'),
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u'punct', (u'.', u'.'))]]
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>>> sum([[parse.tree() for parse in dep_graphs] for dep_graphs in dep_parser.raw_parse_sents((
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... "The quick brown fox jumps over the lazy dog.",
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... "The quick grey wolf jumps over the lazy fox."
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... ))], []) # doctest: +NORMALIZE_WHITESPACE
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[Tree('jumps', [Tree('fox', ['The', 'quick', 'brown']), Tree('dog', ['over',
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'the', 'lazy']), '.']), Tree('jumps', [Tree('wolf', ['The', 'quick', 'grey']),
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Tree('fox', ['over', 'the', 'lazy']), '.'])]
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>>> sum([[parse.tree() for parse in dep_graphs] for dep_graphs in dep_parser.parse_sents((
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... "I 'm a dog".split(),
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... "This is my friends ' cat ( the tabby )".split(),
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... ))], []) # doctest: +NORMALIZE_WHITESPACE
|
|
[Tree('dog', ['I', "'m", 'a']), Tree('cat', ['This', 'is', Tree('friends',
|
|
['my', "'"]), Tree('tabby', ['-LRB-', 'the', '-RRB-'])])]
|
|
'''
|
|
|
|
_OUTPUT_FORMAT = 'conll'
|
|
_MAIN_CLASS = 'edu.stanford.nlp.pipeline.StanfordCoreNLP'
|
|
_JAR = r'stanford-corenlp-(\d+)(\.(\d+))+\.jar'
|
|
_MODEL_JAR_PATTERN = r'stanford-corenlp-(\d+)(\.(\d+))+-models\.jar'
|
|
_USE_STDIN = True
|
|
_DOUBLE_SPACED_OUTPUT = True
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
warnings.warn(
|
|
"The StanfordNeuralDependencyParser will be deprecated\n"
|
|
"Please use \033[91mnltk.parse.corenlp.CoreNLPDependencyParser\033[0m instead.",
|
|
DeprecationWarning,
|
|
stacklevel=2,
|
|
)
|
|
|
|
super(StanfordNeuralDependencyParser, self).__init__(*args, **kwargs)
|
|
self.corenlp_options += '-annotators tokenize,ssplit,pos,depparse'
|
|
|
|
def tagged_parse_sents(self, sentences, verbose=False):
|
|
'''
|
|
Currently unimplemented because the neural dependency parser (and
|
|
the StanfordCoreNLP pipeline class) doesn't support passing in pre-
|
|
tagged tokens.
|
|
'''
|
|
raise NotImplementedError(
|
|
'tagged_parse[_sents] is not supported by '
|
|
'StanfordNeuralDependencyParser; use '
|
|
'parse[_sents] or raw_parse[_sents] instead.'
|
|
)
|
|
|
|
def _make_tree(self, result):
|
|
return DependencyGraph(result, top_relation_label='ROOT')
|
|
|
|
|
|
@skip("doctests from nltk.parse.stanford are skipped because it's deprecated")
|
|
def setup_module(module):
|
|
from nose import SkipTest
|
|
|
|
try:
|
|
StanfordParser(
|
|
model_path='edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz'
|
|
)
|
|
StanfordNeuralDependencyParser()
|
|
except LookupError:
|
|
raise SkipTest(
|
|
'doctests from nltk.parse.stanford are skipped because one of the stanford parser or CoreNLP jars doesn\'t exist'
|
|
)
|