mirror of
https://github.com/explosion/spaCy.git
synced 2025-11-04 01:48:04 +03:00
602 lines
20 KiB
Cython
602 lines
20 KiB
Cython
# encoding: utf8
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# cython: infer_types=True
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from __future__ import unicode_literals
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from libc.string cimport memcpy
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from cpython.mem cimport PyMem_Malloc, PyMem_Free
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# Compiler crashes on memory view coercion without this. Should report bug.
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from cython.view cimport array as cvarray
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cimport numpy as np
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np.import_array()
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import numpy
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import six
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from ..typedefs cimport hash_t
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from ..lexeme cimport Lexeme
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from .. import parts_of_speech
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from ..attrs cimport LEMMA
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from ..attrs cimport ID, ORTH, NORM, LOWER, SHAPE, PREFIX, SUFFIX, LENGTH, CLUSTER
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from ..attrs cimport POS, LEMMA, TAG, DEP
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from ..parts_of_speech cimport CONJ, PUNCT
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from ..attrs cimport IS_ALPHA, IS_ASCII, IS_DIGIT, IS_LOWER, IS_PUNCT, IS_SPACE
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from ..attrs cimport IS_BRACKET
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from ..attrs cimport IS_QUOTE
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from ..attrs cimport IS_LEFT_PUNCT
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from ..attrs cimport IS_RIGHT_PUNCT
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from ..attrs cimport IS_TITLE, IS_UPPER, LIKE_URL, LIKE_NUM, LIKE_EMAIL, IS_STOP
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from ..attrs cimport IS_OOV
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from ..lexeme cimport Lexeme
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cdef class Token:
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"""An individual token --- i.e. a word, punctuation symbol, whitespace, etc.
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"""
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def __cinit__(self, Vocab vocab, Doc doc, int offset):
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self.vocab = vocab
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self.doc = doc
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self.c = &self.doc.c[offset]
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self.i = offset
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def __len__(self):
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'''Number of unicode characters in token.text'''
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return self.c.lex.length
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def __unicode__(self):
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return self.text
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def __bytes__(self):
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return self.text.encode('utf8')
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def __str__(self):
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if six.PY3:
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return self.__unicode__()
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return self.__bytes__()
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def __repr__(self):
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return self.__str__()
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cpdef bint check_flag(self, attr_id_t flag_id) except -1:
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'''Check the value of a boolean flag.
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Arguments:
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flag_id (int): The ID of the flag attribute.
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Returns:
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is_set (bool): Whether the flag is set.
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'''
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return Lexeme.c_check_flag(self.c.lex, flag_id)
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def nbor(self, int i=1):
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'''Get a neighboring token.
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Arguments:
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i (int): The relative position of the token to get. Defaults to 1.
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Returns:
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neighbor (Token): The token at position self.doc[self.i+i]
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'''
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return self.doc[self.i+i]
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def similarity(self, other):
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'''Compute a semantic similarity estimate. Defaults to cosine over vectors.
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Arguments:
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other:
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The object to compare with. By default, accepts Doc, Span,
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Token and Lexeme objects.
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Returns:
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score (float): A scalar similarity score. Higher is more similar.
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'''
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if 'similarity' in self.doc.user_token_hooks:
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return self.doc.user_token_hooks['similarity'](self)
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if self.vector_norm == 0 or other.vector_norm == 0:
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return 0.0
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return numpy.dot(self.vector, other.vector) / (self.vector_norm * other.vector_norm)
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property lex_id:
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def __get__(self):
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return self.c.lex.id
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property rank:
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def __get__(self):
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return self.c.lex.id
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property string:
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def __get__(self):
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return self.text_with_ws
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property text:
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def __get__(self):
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return self.orth_
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property text_with_ws:
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def __get__(self):
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cdef unicode orth = self.vocab.strings[self.c.lex.orth]
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if self.c.spacy:
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return orth + u' '
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else:
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return orth
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property prob:
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def __get__(self):
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return self.c.lex.prob
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property sentiment:
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def __get__(self):
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if 'sentiment' in self.doc.user_token_hooks:
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return self.doc.user_token_hooks['sentiment'](self)
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return self.c.lex.sentiment
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property lang:
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def __get__(self):
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return self.c.lex.lang
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property idx:
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def __get__(self):
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return self.c.idx
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property cluster:
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def __get__(self):
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return self.c.lex.cluster
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property orth:
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def __get__(self):
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return self.c.lex.orth
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property lower:
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def __get__(self):
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return self.c.lex.lower
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property norm:
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def __get__(self):
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return self.c.lex.norm
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property shape:
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def __get__(self):
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return self.c.lex.shape
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property prefix:
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def __get__(self):
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return self.c.lex.prefix
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property suffix:
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def __get__(self):
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return self.c.lex.suffix
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property lemma:
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def __get__(self):
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return self.c.lemma
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property pos:
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def __get__(self):
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return self.c.pos
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property tag:
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def __get__(self):
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return self.c.tag
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def __set__(self, int tag):
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self.vocab.morphology.assign_tag(self.c, tag)
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property dep:
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def __get__(self):
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return self.c.dep
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def __set__(self, int label):
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self.c.dep = label
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property has_vector:
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'''
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A boolean value indicating whether a word vector is associated with the object.
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'''
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def __get__(self):
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if 'has_vector' in self.doc.user_token_hooks:
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return self.doc.user_token_hooks['has_vector'](self)
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cdef int i
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for i in range(self.vocab.vectors_length):
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if self.c.lex.vector[i] != 0:
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return True
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else:
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return False
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property vector:
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'''
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A real-valued meaning representation.
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Type: numpy.ndarray[ndim=1, dtype='float32']
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'''
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def __get__(self):
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if 'vector' in self.doc.user_token_hooks:
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return self.doc.user_token_hooks['vector'](self)
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cdef int length = self.vocab.vectors_length
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if length == 0:
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raise ValueError(
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"Word vectors set to length 0. This may be because the "
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"data is not installed. If you haven't already, run"
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"\npython -m spacy.%s.download all\n"
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"to install the data." % self.vocab.lang
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)
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vector_view = <float[:length,]>self.c.lex.vector
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return numpy.asarray(vector_view)
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property repvec:
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def __get__(self):
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raise AttributeError("repvec was renamed to vector in v0.100")
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property has_repvec:
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def __get__(self):
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raise AttributeError("has_repvec was renamed to has_vector in v0.100")
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property vector_norm:
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def __get__(self):
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if 'vector_norm' in self.doc.user_token_hooks:
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return self.doc.user_token_hooks['vector_norm'](self)
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return self.c.lex.l2_norm
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property n_lefts:
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def __get__(self):
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return self.c.l_kids
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property n_rights:
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def __get__(self):
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return self.c.r_kids
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property lefts:
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def __get__(self):
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"""The leftward immediate children of the word, in the syntactic
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dependency parse.
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"""
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cdef int nr_iter = 0
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cdef const TokenC* ptr = self.c - (self.i - self.c.l_edge)
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while ptr < self.c:
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if ptr + ptr.head == self.c:
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yield self.doc[ptr - (self.c - self.i)]
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ptr += 1
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nr_iter += 1
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# This is ugly, but it's a way to guard out infinite loops
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if nr_iter >= 10000000:
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raise RuntimeError(
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"Possibly infinite loop encountered while looking for token.lefts")
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property rights:
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def __get__(self):
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"""The rightward immediate children of the word, in the syntactic
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dependency parse."""
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cdef const TokenC* ptr = self.c + (self.c.r_edge - self.i)
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tokens = []
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cdef int nr_iter = 0
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while ptr > self.c:
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if ptr + ptr.head == self.c:
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tokens.append(self.doc[ptr - (self.c - self.i)])
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ptr -= 1
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nr_iter += 1
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if nr_iter >= 10000000:
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raise RuntimeError(
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"Possibly infinite loop encountered while looking for token.rights")
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tokens.reverse()
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for t in tokens:
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yield t
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property children:
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'''A sequence of the token's immediate syntactic children.
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Yields: Token A child token such that child.head==self
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'''
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def __get__(self):
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yield from self.lefts
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yield from self.rights
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property subtree:
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'''A sequence of all the token's syntactic descendents.
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Yields: Token A descendent token such that self.is_ancestor(descendent)
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'''
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def __get__(self):
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for word in self.lefts:
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yield from word.subtree
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yield self
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for word in self.rights:
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yield from word.subtree
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property left_edge:
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'''The leftmost token of this token's syntactic descendents.
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Returns: Token The first token such that self.is_ancestor(token)
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'''
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def __get__(self):
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return self.doc[self.c.l_edge]
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property right_edge:
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'''The rightmost token of this token's syntactic descendents.
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Returns: Token The last token such that self.is_ancestor(token)
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'''
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def __get__(self):
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return self.doc[self.c.r_edge]
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property ancestors:
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'''A sequence of this token's syntactic ancestors.
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Yields: Token A sequence of ancestor tokens such that ancestor.is_ancestor(self)
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'''
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def __get__(self):
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cdef const TokenC* head_ptr = self.c
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# guard against infinite loop, no token can have
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# more ancestors than tokens in the tree
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cdef int i = 0
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while head_ptr.head != 0 and i < self.doc.length:
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head_ptr += head_ptr.head
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yield self.doc[head_ptr - (self.c - self.i)]
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i += 1
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def is_ancestor_of(self, descendant):
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# TODO: Remove after backward compatibility check.
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return self.is_ancestor(descendant)
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def is_ancestor(self, descendant):
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'''Check whether this token is a parent, grandparent, etc. of another
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in the dependency tree.
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Arguments:
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descendant (Token): Another token.
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Returns:
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is_ancestor (bool): Whether this token is the ancestor of the descendant.
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'''
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if self.doc is not descendant.doc:
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return False
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return any( ancestor.i == self.i for ancestor in descendant.ancestors )
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property head:
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'''The syntactic parent, or "governor", of this token.
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Returns: Token
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'''
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def __get__(self):
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"""The token predicted by the parser to be the head of the current token."""
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return self.doc[self.i + self.c.head]
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def __set__(self, Token new_head):
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# this function sets the head of self to new_head
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# and updates the counters for left/right dependents
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# and left/right corner for the new and the old head
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# do nothing if old head is new head
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if self.i + self.c.head == new_head.i:
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return
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cdef Token old_head = self.head
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cdef int rel_newhead_i = new_head.i - self.i
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# is the new head a descendant of the old head
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cdef bint is_desc = old_head.is_ancestor_of(new_head)
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cdef int new_edge
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cdef Token anc, child
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# update number of deps of old head
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if self.c.head > 0: # left dependent
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old_head.c.l_kids -= 1
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if self.c.l_edge == old_head.c.l_edge:
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# the token dominates the left edge so the left edge of the head
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# may change when the token is reattached
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# it may not change if the new head is a descendant of the current head
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new_edge = self.c.l_edge
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# the new l_edge is the left-most l_edge on any of the other dependents
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# where the l_edge is left of the head, otherwise it is the head
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if not is_desc:
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new_edge = old_head.i
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for child in old_head.children:
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if child == self:
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continue
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if child.c.l_edge < new_edge:
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new_edge = child.c.l_edge
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old_head.c.l_edge = new_edge
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# walk up the tree from old_head and assign new l_edge to ancestors
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# until an ancestor already has an l_edge that's further left
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for anc in old_head.ancestors:
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if anc.c.l_edge <= new_edge:
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break
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anc.c.l_edge = new_edge
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elif self.c.head < 0: # right dependent
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old_head.c.r_kids -= 1
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# do the same thing as for l_edge
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if self.c.r_edge == old_head.c.r_edge:
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new_edge = self.c.r_edge
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if not is_desc:
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new_edge = old_head.i
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for child in old_head.children:
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if child == self:
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continue
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if child.c.r_edge > new_edge:
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new_edge = child.c.r_edge
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old_head.c.r_edge = new_edge
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for anc in old_head.ancestors:
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if anc.c.r_edge >= new_edge:
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break
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anc.c.r_edge = new_edge
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# update number of deps of new head
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if rel_newhead_i > 0: # left dependent
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new_head.c.l_kids += 1
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# walk up the tree from new head and set l_edge to self.l_edge
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# until you hit a token with an l_edge further to the left
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if self.c.l_edge < new_head.c.l_edge:
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new_head.c.l_edge = self.c.l_edge
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for anc in new_head.ancestors:
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if anc.c.l_edge <= self.c.l_edge:
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break
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anc.c.l_edge = self.c.l_edge
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elif rel_newhead_i < 0: # right dependent
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new_head.c.r_kids += 1
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# do the same as for l_edge
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if self.c.r_edge > new_head.c.r_edge:
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new_head.c.r_edge = self.c.r_edge
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for anc in new_head.ancestors:
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if anc.c.r_edge >= self.c.r_edge:
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break
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anc.c.r_edge = self.c.r_edge
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# set new head
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self.c.head = rel_newhead_i
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property conjuncts:
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'''A sequence of coordinated tokens, including the token itself.
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Yields: Token A coordinated token
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'''
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def __get__(self):
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"""Get a list of conjoined words."""
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cdef Token word
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if 'conjuncts' in self.doc.user_token_hooks:
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yield from self.doc.user_token_hooks['conjuncts'](self)
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else:
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if self.dep_ != 'conj':
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for word in self.rights:
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if word.dep_ == 'conj':
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yield word
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yield from word.conjuncts
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property ent_type:
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def __get__(self):
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return self.c.ent_type
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property ent_iob:
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def __get__(self):
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return self.c.ent_iob
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property ent_type_:
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def __get__(self):
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return self.vocab.strings[self.c.ent_type]
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property ent_iob_:
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def __get__(self):
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iob_strings = ('', 'I', 'O', 'B')
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return iob_strings[self.c.ent_iob]
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property ent_id:
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'''An (integer) entity ID. Usually assigned by patterns in the Matcher.'''
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def __get__(self):
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return self.c.ent_id
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def __set__(self, hash_t key):
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# TODO
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raise NotImplementedError(
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"Can't yet set ent_id from Token. Vote for this feature on the issue "
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"tracker: http://github.com/spacy-io/spaCy")
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property ent_id_:
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'''A (string) entity ID. Usually assigned by patterns in the Matcher.'''
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def __get__(self):
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return self.vocab.strings[self.c.ent_id]
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def __set__(self, hash_t key):
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# TODO
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raise NotImplementedError(
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"Can't yet set ent_id_ from Token. Vote for this feature on the issue "
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"tracker: http://github.com/spacy-io/spaCy")
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property whitespace_:
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def __get__(self):
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return ' ' if self.c.spacy else ''
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property orth_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.orth]
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property lower_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.lower]
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property norm_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.norm]
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property shape_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.shape]
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property prefix_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.prefix]
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property suffix_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.suffix]
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property lang_:
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def __get__(self):
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return self.vocab.strings[self.c.lex.lang]
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property lemma_:
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def __get__(self):
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return self.vocab.strings[self.c.lemma]
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property pos_:
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def __get__(self):
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return parts_of_speech.NAMES[self.c.pos]
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|
|
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property tag_:
|
|
def __get__(self):
|
|
return self.vocab.strings[self.c.tag]
|
|
def __set__(self, tag):
|
|
self.tag = self.vocab.strings[tag]
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|
|
|
property dep_:
|
|
def __get__(self):
|
|
return self.vocab.strings[self.c.dep]
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|
def __set__(self, unicode label):
|
|
self.c.dep = self.vocab.strings[label]
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|
|
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property is_oov:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_OOV)
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|
|
|
property is_stop:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_STOP)
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|
|
|
property is_alpha:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_ALPHA)
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|
|
|
property is_ascii:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_ASCII)
|
|
|
|
property is_digit:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_DIGIT)
|
|
|
|
property is_lower:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_LOWER)
|
|
|
|
property is_title:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_TITLE)
|
|
|
|
property is_punct:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_PUNCT)
|
|
|
|
property is_space:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_SPACE)
|
|
|
|
property is_bracket:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_BRACKET)
|
|
|
|
property is_quote:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_QUOTE)
|
|
|
|
property is_left_punct:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_LEFT_PUNCT)
|
|
|
|
property is_right_punct:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, IS_RIGHT_PUNCT)
|
|
|
|
property like_url:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, LIKE_URL)
|
|
|
|
property like_num:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, LIKE_NUM)
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|
|
|
property like_email:
|
|
def __get__(self): return Lexeme.c_check_flag(self.c.lex, LIKE_EMAIL)
|