mirror of
https://github.com/explosion/spaCy.git
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315 lines
10 KiB
Cython
315 lines
10 KiB
Cython
# cython: profile=True
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from __future__ import unicode_literals
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from os import path
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from .typedefs cimport attr_t
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from .typedefs cimport hash_t
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from .attrs cimport attr_id_t
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from .structs cimport TokenC, LexemeC
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from .lexeme cimport Lexeme
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from cymem.cymem cimport Pool
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from preshed.maps cimport PreshMap
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from libcpp.vector cimport vector
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from murmurhash.mrmr cimport hash64
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from .attrs cimport LENGTH, ENT_TYPE, ORTH, NORM, LEMMA, LOWER, SHAPE
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from .attrs cimport FLAG14, FLAG15, FLAG16, FLAG17, FLAG18, FLAG19, FLAG20, FLAG21, FLAG22, FLAG23, FLAG24, FLAG25
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from .tokens.doc cimport get_token_attr
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from .tokens.doc cimport Doc
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from .vocab cimport Vocab
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from .attrs import FLAG61 as U_ENT
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from .attrs import FLAG60 as B2_ENT
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from .attrs import FLAG59 as B3_ENT
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from .attrs import FLAG58 as B4_ENT
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from .attrs import FLAG57 as B5_ENT
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from .attrs import FLAG56 as B6_ENT
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from .attrs import FLAG55 as B7_ENT
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from .attrs import FLAG54 as B8_ENT
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from .attrs import FLAG53 as B9_ENT
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from .attrs import FLAG52 as B10_ENT
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from .attrs import FLAG51 as I3_ENT
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from .attrs import FLAG50 as I4_ENT
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from .attrs import FLAG49 as I5_ENT
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from .attrs import FLAG48 as I6_ENT
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from .attrs import FLAG47 as I7_ENT
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from .attrs import FLAG46 as I8_ENT
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from .attrs import FLAG45 as I9_ENT
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from .attrs import FLAG44 as I10_ENT
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from .attrs import FLAG43 as L2_ENT
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from .attrs import FLAG42 as L3_ENT
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from .attrs import FLAG41 as L4_ENT
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from .attrs import FLAG40 as L5_ENT
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from .attrs import FLAG39 as L6_ENT
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from .attrs import FLAG38 as L7_ENT
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from .attrs import FLAG37 as L8_ENT
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from .attrs import FLAG36 as L9_ENT
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from .attrs import FLAG35 as L10_ENT
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try:
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import ujson as json
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except ImportError:
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import json
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cdef struct AttrValue:
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attr_id_t attr
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attr_t value
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cdef struct Pattern:
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AttrValue* spec
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int length
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cdef Pattern* init_pattern(Pool mem, object token_specs, attr_t entity_type) except NULL:
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pattern = <Pattern*>mem.alloc(len(token_specs) + 1, sizeof(Pattern))
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cdef int i
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for i, spec in enumerate(token_specs):
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pattern[i].spec = <AttrValue*>mem.alloc(len(spec), sizeof(AttrValue))
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pattern[i].length = len(spec)
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for j, (attr, value) in enumerate(spec):
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pattern[i].spec[j].attr = attr
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pattern[i].spec[j].value = value
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i = len(token_specs)
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pattern[i].spec = <AttrValue*>mem.alloc(2, sizeof(AttrValue))
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pattern[i].spec[0].attr = ENT_TYPE
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pattern[i].spec[0].value = entity_type
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pattern[i].spec[1].attr = LENGTH
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pattern[i].spec[1].value = len(token_specs)
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pattern[i].length = 0
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return pattern
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cdef int match(const Pattern* pattern, const TokenC* token) except -1:
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cdef int i
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for i in range(pattern.length):
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if get_token_attr(token, pattern.spec[i].attr) != pattern.spec[i].value:
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return False
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return True
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cdef int is_final(const Pattern* pattern) except -1:
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return (pattern + 1).length == 0
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cdef object get_entity(const Pattern* pattern, const TokenC* tokens, int i):
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pattern += 1
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i += 1
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return (pattern.spec[0].value, i - pattern.spec[1].value, i)
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def _convert_strings(token_specs, string_store):
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converted = []
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for spec in token_specs:
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converted.append([])
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for attr, value in spec.items():
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if isinstance(attr, basestring):
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attr = map_attr_name(attr)
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if isinstance(value, basestring):
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value = string_store[value]
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if isinstance(value, bool):
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value = int(value)
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converted[-1].append((attr, value))
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return converted
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def get_bilou(length):
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if length == 1:
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return [U_ENT]
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elif length == 2:
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return [B2_ENT, L2_ENT]
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elif length == 3:
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return [B3_ENT, I3_ENT, L3_ENT]
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elif length == 4:
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return [B4_ENT, I4_ENT, I4_ENT, L4_ENT]
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elif length == 5:
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return [B5_ENT, I5_ENT, I5_ENT, I5_ENT, L5_ENT]
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elif length == 6:
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return [B6_ENT, I6_ENT, I6_ENT, I6_ENT, I6_ENT, L6_ENT]
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elif length == 7:
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return [B7_ENT, I7_ENT, I7_ENT, I7_ENT, I7_ENT, I7_ENT, L7_ENT]
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elif length == 8:
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return [B8_ENT, I8_ENT, I8_ENT, I8_ENT, I8_ENT, I8_ENT, I8_ENT, L8_ENT]
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elif length == 9:
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return [B9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, L9_ENT]
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elif length == 10:
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return [B10_ENT, I10_ENT, I10_ENT, I10_ENT, I10_ENT, I10_ENT, I10_ENT,
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I10_ENT, I10_ENT, L10_ENT]
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else:
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raise ValueError("Max length currently 10 for phrase matching")
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def map_attr_name(attr):
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attr = attr.upper()
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if attr == 'ORTH':
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return ORTH
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elif attr == 'LEMMA':
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return LEMMA
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elif attr == 'LOWER':
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return LOWER
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elif attr == 'SHAPE':
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return SHAPE
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elif attr == 'NORM':
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return NORM
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else:
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raise Exception("TODO: Finish supporting attr mapping %s" % attr)
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cdef class Matcher:
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cdef Pool mem
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cdef vector[Pattern*] patterns
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cdef readonly Vocab vocab
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cdef object _patterns
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@classmethod
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def from_package(cls, package, Vocab vocab):
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patterns = package.load_utf8(json.load,
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'vocab', 'gazetteer.json',
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default={}) # TODO: really optional?
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return cls(vocab, patterns)
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def __init__(self, vocab, patterns):
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self.vocab = vocab
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self.mem = Pool()
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self.vocab = vocab
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self._patterns = dict(patterns)
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for entity_key, (etype, attrs, specs) in sorted(patterns.items()):
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self.add(entity_key, etype, attrs, specs)
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def __reduce__(self):
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return (self.__class__, (self.vocab, self._patterns), None, None)
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property n_patterns:
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def __get__(self): return self.patterns.size()
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def add(self, entity_key, etype, attrs, specs):
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self._patterns[entity_key] = (etype, dict(attrs), list(specs))
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if isinstance(entity_key, basestring):
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entity_key = self.vocab.strings[entity_key]
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if isinstance(etype, basestring):
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etype = self.vocab.strings[etype]
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elif etype is None:
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etype = -1
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# TODO: Do something more clever about multiple patterns for single
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# entity
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for spec in specs:
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spec = _convert_strings(spec, self.vocab.strings)
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self.patterns.push_back(init_pattern(self.mem, spec, etype))
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def __call__(self, Doc doc, acceptor=None):
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cdef vector[Pattern*] partials
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cdef int n_partials = 0
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cdef int q = 0
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cdef int i, token_i
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cdef const TokenC* token
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cdef Pattern* state
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matches = []
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for token_i in range(doc.length):
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token = &doc.c[token_i]
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q = 0
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# Go over the open matches, extending or finalizing if able. Otherwise,
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# we over-write them (q doesn't advance)
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for state in partials:
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if match(state, token):
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if is_final(state):
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label, start, end = get_entity(state, token, token_i)
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if acceptor is None or acceptor(doc, label, start, end):
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matches.append((label, start, end))
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else:
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partials[q] = state + 1
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q += 1
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partials.resize(q)
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# Check whether we open any new patterns on this token
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for state in self.patterns:
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if match(state, token):
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if is_final(state):
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label, start, end = get_entity(state, token, token_i)
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if acceptor is None or acceptor(doc, label, start, end):
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matches.append((label, start, end))
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else:
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partials.push_back(state + 1)
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seen = set()
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filtered = []
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for label, start, end in sorted(matches, key=lambda m: (m[1], -(m[1] - m[2]))):
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if all(i in seen for i in range(start, end)):
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continue
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else:
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for i in range(start, end):
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seen.add(i)
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filtered.append((label, start, end))
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doc.ents = [(e.label, e.start, e.end) for e in doc.ents] + filtered
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return matches
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cdef class PhraseMatcher:
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cdef Pool mem
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cdef Vocab vocab
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cdef Matcher matcher
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cdef PreshMap phrase_ids
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cdef int max_length
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cdef attr_t* _phrase_key
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def __init__(self, Vocab vocab, phrases, max_length=10):
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self.mem = Pool()
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self._phrase_key = <attr_t*>self.mem.alloc(max_length, sizeof(attr_t))
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self.max_length = max_length
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self.vocab = vocab
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self.matcher = Matcher(self.vocab, {})
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self.phrase_ids = PreshMap()
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for phrase in phrases:
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if len(phrase) < max_length:
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self.add(phrase)
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abstract_patterns = []
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for length in range(1, max_length):
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abstract_patterns.append([{tag: True} for tag in get_bilou(length)])
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self.matcher.add('Candidate', 'MWE', {}, abstract_patterns)
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def add(self, Doc tokens):
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cdef int length = tokens.length
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assert length < self.max_length
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tags = get_bilou(length)
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assert len(tags) == length, length
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cdef int i
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for i in range(self.max_length):
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self._phrase_key[i] = 0
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for i, tag in enumerate(tags):
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lexeme = self.vocab[tokens.c[i].lex.orth]
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lexeme.set_flag(tag, True)
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self._phrase_key[i] = lexeme.orth
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cdef hash_t key = hash64(self._phrase_key, self.max_length * sizeof(attr_t), 0)
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self.phrase_ids[key] = True
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def __call__(self, Doc doc):
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matches = []
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for label, start, end in self.matcher(doc, acceptor=self.accept_match):
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cand = doc[start : end]
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start = cand[0].idx
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end = cand[-1].idx + len(cand[-1])
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matches.append((start, end, cand.root.tag_, cand.text, 'MWE'))
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for match in matches:
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doc.merge(*match)
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return matches
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def accept_match(self, Doc doc, int label, int start, int end):
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assert (end - start) < self.max_length
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cdef int i, j
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for i in range(self.max_length):
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self._phrase_key[i] = 0
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for i, j in enumerate(range(start, end)):
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self._phrase_key[i] = doc.c[j].lex.orth
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cdef hash_t key = hash64(self._phrase_key, self.max_length * sizeof(attr_t), 0)
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if self.phrase_ids.get(key):
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return True
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else:
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return False
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