mirror of https://github.com/explosion/spaCy.git
299 lines
9.9 KiB
Cython
299 lines
9.9 KiB
Cython
# cython: embedsignature=True
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# coding: utf8
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from __future__ import unicode_literals, print_function
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from libc.math cimport sqrt
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from cpython.ref cimport Py_INCREF
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from cymem.cymem cimport Pool
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from murmurhash.mrmr cimport hash64
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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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from libc.string cimport memset
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import numpy
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from .typedefs cimport attr_t, flags_t
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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_TITLE, IS_UPPER, LIKE_URL, LIKE_NUM, LIKE_EMAIL, IS_STOP
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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_OOV
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memset(&EMPTY_LEXEME, 0, sizeof(LexemeC))
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cdef class Lexeme:
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"""
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An entry in the vocabulary. A Lexeme has no string context --- it's a
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word-type, as opposed to a word token. It therefore has no part-of-speech
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tag, dependency parse, or lemma (lemmatization depends on the part-of-speech
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tag).
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"""
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def __init__(self, Vocab vocab, int orth):
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"""
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Create a Lexeme object.
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Arguments:
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vocab (Vocab): The parent vocabulary
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orth (int): The orth id of the lexeme.
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Returns (Lexeme): The newly constructd object.
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"""
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self.vocab = vocab
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self.orth = orth
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self.c = <LexemeC*><void*>vocab.get_by_orth(vocab.mem, orth)
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assert self.c.orth == orth
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def __richcmp__(self, other, int op):
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if isinstance(other, Lexeme):
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a = self.orth
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b = other.orth
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elif isinstance(other, int):
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a = self.orth
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b = other
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elif isinstance(other, str):
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a = self.orth_
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b = other
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else:
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a = 0
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b = 1
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if op == 2: # ==
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return a == b
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elif op == 3: # !=
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return a != b
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elif op == 0: # <
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return a < b
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elif op == 1: # <=
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return a <= b
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elif op == 4: # >
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return a > b
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elif op == 5: # >=
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return a >= b
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else:
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raise NotImplementedError(op)
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def __hash__(self):
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return self.c.orth
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def set_flag(self, attr_id_t flag_id, bint value):
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"""
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Change the value of a boolean flag.
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Arguments:
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flag_id (int): The attribute ID of the flag to set.
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value (bool): The new value of the flag.
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"""
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Lexeme.c_set_flag(self.c, flag_id, value)
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def check_flag(self, attr_id_t flag_id):
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"""
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Check the value of a boolean flag.
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Arguments:
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flag_id (int): The attribute ID of the flag to query.
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Returns (bool): The value of the flag.
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"""
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return True if Lexeme.c_check_flag(self.c, flag_id) else False
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def similarity(self, other):
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"""
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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 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 has_vector:
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def __get__(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.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_norm:
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def __get__(self):
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return self.c.l2_norm
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def __set__(self, float value):
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self.c.l2_norm = value
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property vector:
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def __get__(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 download %s\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.vector
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return numpy.asarray(vector_view)
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def __set__(self, vector):
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assert len(vector) == self.vocab.vectors_length
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cdef float value
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cdef double norm = 0.0
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for i, value in enumerate(vector):
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self.c.vector[i] = value
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norm += value * value
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self.c.l2_norm = sqrt(norm)
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property rank:
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def __get__(self):
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return self.c.id
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property repvec:
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def __get__(self):
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raise AttributeError("lex.repvec has been renamed to lex.vector")
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property sentiment:
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def __get__(self):
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return self.c.sentiment
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def __set__(self, float sentiment):
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self.c.sentiment = sentiment
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property orth_:
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def __get__(self):
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return self.vocab.strings[self.c.orth]
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property lower:
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def __get__(self): return self.c.lower
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def __set__(self, int x): self.c.lower = x
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property norm:
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def __get__(self): return self.c.norm
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def __set__(self, int x): self.c.norm = x
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property shape:
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def __get__(self): return self.c.shape
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def __set__(self, int x): self.c.shape = x
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property prefix:
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def __get__(self): return self.c.prefix
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def __set__(self, int x): self.c.prefix = x
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property suffix:
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def __get__(self): return self.c.suffix
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def __set__(self, int x): self.c.suffix = x
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property cluster:
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def __get__(self): return self.c.cluster
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def __set__(self, int x): self.c.cluster = x
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property lang:
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def __get__(self): return self.c.lang
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def __set__(self, int x): self.c.lang = x
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property prob:
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def __get__(self): return self.c.prob
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def __set__(self, float x): self.c.prob = x
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property lower_:
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def __get__(self): return self.vocab.strings[self.c.lower]
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def __set__(self, unicode x): self.c.lower = self.vocab.strings[x]
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property norm_:
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def __get__(self): return self.vocab.strings[self.c.norm]
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def __set__(self, unicode x): self.c.norm = self.vocab.strings[x]
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property shape_:
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def __get__(self): return self.vocab.strings[self.c.shape]
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def __set__(self, unicode x): self.c.shape = self.vocab.strings[x]
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property prefix_:
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def __get__(self): return self.vocab.strings[self.c.prefix]
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def __set__(self, unicode x): self.c.prefix = self.vocab.strings[x]
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property suffix_:
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def __get__(self): return self.vocab.strings[self.c.suffix]
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def __set__(self, unicode x): self.c.suffix = self.vocab.strings[x]
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property lang_:
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def __get__(self): return self.vocab.strings[self.c.lang]
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def __set__(self, unicode x): self.c.lang = self.vocab.strings[x]
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property flags:
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def __get__(self): return self.c.flags
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def __set__(self, flags_t x): self.c.flags = x
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property is_oov:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_OOV)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_OOV, x)
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property is_stop:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_STOP)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_STOP, x)
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property is_alpha:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_ALPHA)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_ALPHA, x)
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property is_ascii:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_ASCII)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_ASCII, x)
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property is_digit:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_DIGIT)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_DIGIT, x)
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property is_lower:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_LOWER)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_LOWER, x)
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property is_title:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_TITLE)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_TITLE, x)
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property is_punct:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_PUNCT)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_PUNCT, x)
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property is_space:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_SPACE)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_SPACE, x)
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property is_bracket:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_BRACKET)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_BRACKET, x)
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property is_quote:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_QUOTE)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_QUOTE, x)
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property is_left_punct:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_LEFT_PUNCT)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_LEFT_PUNCT, x)
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property is_right_punct:
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def __get__(self): return Lexeme.c_check_flag(self.c, IS_RIGHT_PUNCT)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, IS_RIGHT_PUNCT, x)
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property like_url:
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def __get__(self): return Lexeme.c_check_flag(self.c, LIKE_URL)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, LIKE_URL, x)
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property like_num:
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def __get__(self): return Lexeme.c_check_flag(self.c, LIKE_NUM)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, LIKE_NUM, x)
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property like_email:
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def __get__(self): return Lexeme.c_check_flag(self.c, LIKE_EMAIL)
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def __set__(self, bint x): Lexeme.c_set_flag(self.c, LIKE_EMAIL, x)
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