mirror of
https://github.com/explosion/spaCy.git
synced 2025-11-04 01:48:04 +03:00
Move matcher2.pyx to matcher.pyx
This commit is contained in:
Matthew Honnibal
parent
9ebf2fe7c3
commit
1c19605426
|
|
@ -1,30 +1,18 @@
|
|||
# cython: profile=True
|
||||
# cython: infer_types=True
|
||||
# coding: utf8
|
||||
from __future__ import unicode_literals
|
||||
|
||||
import ujson
|
||||
from cymem.cymem cimport Pool
|
||||
from preshed.maps cimport PreshMap
|
||||
# cython: profile=True
|
||||
from libcpp.vector cimport vector
|
||||
from libcpp.pair cimport pair
|
||||
from cython.operator cimport dereference as deref
|
||||
from libc.stdint cimport int32_t, uint64_t, uint16_t
|
||||
from preshed.maps cimport PreshMap
|
||||
from cymem.cymem cimport Pool
|
||||
from murmurhash.mrmr cimport hash64
|
||||
from libc.stdint cimport int32_t
|
||||
|
||||
# try:
|
||||
# from libcpp.unordered_map cimport unordered_map as umap
|
||||
# except:
|
||||
# from libcpp.map cimport map as umap
|
||||
|
||||
from .typedefs cimport attr_t
|
||||
from .typedefs cimport hash_t
|
||||
from .typedefs cimport attr_t, hash_t
|
||||
from .structs cimport TokenC
|
||||
from .tokens.doc cimport Doc, get_token_attr
|
||||
from .lexeme cimport attr_id_t
|
||||
from .vocab cimport Vocab
|
||||
|
||||
from .tokens.doc cimport Doc
|
||||
from .tokens.doc cimport get_token_attr
|
||||
from .attrs cimport ID, attr_id_t, NULL_ATTR
|
||||
from .attrs import IDS
|
||||
from .attrs cimport attr_id_t, ID, NULL_ATTR
|
||||
from .attrs import FLAG61 as U_ENT
|
||||
from .attrs import FLAG60 as B2_ENT
|
||||
from .attrs import FLAG59 as B3_ENT
|
||||
|
|
@ -54,30 +42,24 @@ from .attrs import FLAG36 as L9_ENT
|
|||
from .attrs import FLAG35 as L10_ENT
|
||||
|
||||
|
||||
cpdef enum quantifier_t:
|
||||
_META
|
||||
ONE
|
||||
cdef enum action_t:
|
||||
REJECT = 0000
|
||||
MATCH = 1000
|
||||
ADVANCE = 0100
|
||||
RETRY = 0010
|
||||
RETRY_EXTEND = 0011
|
||||
MATCH_EXTEND = 1001
|
||||
MATCH_REJECT = 2000
|
||||
|
||||
|
||||
cdef enum quantifier_t:
|
||||
ZERO
|
||||
ZERO_ONE
|
||||
ZERO_PLUS
|
||||
ONE
|
||||
ONE_PLUS
|
||||
|
||||
|
||||
cdef enum action_t:
|
||||
REJECT
|
||||
ADVANCE
|
||||
REPEAT
|
||||
ACCEPT
|
||||
ADVANCE_ZERO
|
||||
ADVANCE_PLUS
|
||||
ACCEPT_PREV
|
||||
PANIC
|
||||
|
||||
|
||||
# Each token pattern consists of a quantifier and 0+ (attr, value) pairs.
|
||||
# A state is an (int, pattern pointer) pair, where the int is the start
|
||||
# position, and the pattern pointer shows where we're up to
|
||||
# in the pattern.
|
||||
|
||||
cdef struct AttrValueC:
|
||||
attr_id_t attr
|
||||
attr_t value
|
||||
|
|
@ -87,28 +69,231 @@ cdef struct TokenPatternC:
|
|||
AttrValueC* attrs
|
||||
int32_t nr_attr
|
||||
quantifier_t quantifier
|
||||
hash_t key
|
||||
|
||||
|
||||
ctypedef TokenPatternC* TokenPatternC_ptr
|
||||
# ctypedef pair[int, TokenPatternC_ptr] StateC
|
||||
cdef struct ActionC:
|
||||
char emit_match
|
||||
char next_state_next_token
|
||||
char next_state_same_token
|
||||
char same_state_next_token
|
||||
|
||||
# Match Dictionary entry type
|
||||
cdef struct MatchEntryC:
|
||||
|
||||
cdef struct PatternStateC:
|
||||
TokenPatternC* pattern
|
||||
int32_t start
|
||||
int32_t end
|
||||
int32_t offset
|
||||
int32_t length
|
||||
|
||||
# A state instance represents the information that defines a
|
||||
# partial match
|
||||
# start: the index of the first token in the partial match
|
||||
# pattern: a pointer to the current token pattern in the full
|
||||
# pattern
|
||||
# last_match: The entry of the last span matched by the
|
||||
# same pattern
|
||||
cdef struct StateC:
|
||||
|
||||
cdef struct MatchC:
|
||||
attr_t pattern_id
|
||||
int32_t start
|
||||
TokenPatternC_ptr pattern
|
||||
MatchEntryC* last_match
|
||||
int32_t length
|
||||
|
||||
|
||||
cdef find_matches(TokenPatternC** patterns, int n, Doc doc):
|
||||
cdef vector[PatternStateC] states
|
||||
cdef vector[MatchC] matches
|
||||
cdef PatternStateC state
|
||||
cdef Pool mem = Pool()
|
||||
# TODO: Prefill this with the extra attribute values.
|
||||
extra_attrs = <attr_t**>mem.alloc(len(doc), sizeof(attr_t*))
|
||||
# Main loop
|
||||
cdef int i, j
|
||||
for i in range(doc.length):
|
||||
for j in range(n):
|
||||
states.push_back(PatternStateC(patterns[j], i, 0))
|
||||
transition_states(states, matches, &doc.c[i], extra_attrs[i])
|
||||
# Handle matches that end in 0-width patterns
|
||||
finish_states(matches, states)
|
||||
return [(matches[i].pattern_id, matches[i].start, matches[i].start+matches[i].length)
|
||||
for i in range(matches.size())]
|
||||
|
||||
|
||||
|
||||
cdef void transition_states(vector[PatternStateC]& states, vector[MatchC]& matches,
|
||||
const TokenC* token, const attr_t* extra_attrs) except *:
|
||||
cdef int q = 0
|
||||
cdef vector[PatternStateC] new_states
|
||||
for i in range(states.size()):
|
||||
action = get_action(states[i], token, extra_attrs)
|
||||
if action == REJECT:
|
||||
continue
|
||||
state = states[i]
|
||||
states[q] = state
|
||||
while action in (RETRY, RETRY_EXTEND):
|
||||
if action == RETRY_EXTEND:
|
||||
new_states.push_back(
|
||||
PatternStateC(pattern=state.pattern, start=state.start,
|
||||
length=state.length+1))
|
||||
states[q].pattern += 1
|
||||
action = get_action(states[q], token, extra_attrs)
|
||||
if action == REJECT:
|
||||
pass
|
||||
elif action == ADVANCE:
|
||||
states[q].pattern += 1
|
||||
states[q].length += 1
|
||||
q += 1
|
||||
else:
|
||||
ent_id = state.pattern[1].attrs.value
|
||||
if action == MATCH:
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start,
|
||||
length=state.length+1))
|
||||
elif action == MATCH_REJECT:
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start,
|
||||
length=state.length))
|
||||
elif action == MATCH_EXTEND:
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start,
|
||||
length=state.length))
|
||||
states[q].length += 1
|
||||
q += 1
|
||||
states.resize(q)
|
||||
for i in range(new_states.size()):
|
||||
states.push_back(new_states[i])
|
||||
|
||||
|
||||
cdef void finish_states(vector[MatchC]& matches, vector[PatternStateC]& states) except *:
|
||||
'''Handle states that end in zero-width patterns.'''
|
||||
cdef PatternStateC state
|
||||
for i in range(states.size()):
|
||||
state = states[i]
|
||||
while get_quantifier(state) in (ZERO_PLUS, ZERO_ONE):
|
||||
is_final = get_is_final(state)
|
||||
if is_final:
|
||||
ent_id = state.pattern[1].attrs.value
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start, length=state.length))
|
||||
break
|
||||
else:
|
||||
state.pattern += 1
|
||||
|
||||
|
||||
cdef action_t get_action(PatternStateC state, const TokenC* token, const attr_t* extra_attrs) nogil:
|
||||
'''We need to consider:
|
||||
|
||||
a) Does the token match the specification? [Yes, No]
|
||||
b) What's the quantifier? [1, 0+, ?]
|
||||
c) Is this the last specification? [final, non-final]
|
||||
|
||||
We can transition in the following ways:
|
||||
|
||||
a) Do we emit a match?
|
||||
b) Do we add a state with (next state, next token)?
|
||||
c) Do we add a state with (next state, same token)?
|
||||
d) Do we add a state with (same state, next token)?
|
||||
|
||||
We'll code the actions as boolean strings, so 0000 means no to all 4,
|
||||
1000 means match but no states added, etc.
|
||||
|
||||
1:
|
||||
Yes, final:
|
||||
1000
|
||||
Yes, non-final:
|
||||
0100
|
||||
No, final:
|
||||
0000
|
||||
No, non-final
|
||||
0000
|
||||
0+:
|
||||
Yes, final:
|
||||
1001
|
||||
Yes, non-final:
|
||||
0011
|
||||
No, final:
|
||||
1000 (note: Don't include last token!)
|
||||
No, non-final:
|
||||
0010
|
||||
?:
|
||||
Yes, final:
|
||||
1000
|
||||
Yes, non-final:
|
||||
0100
|
||||
No, final:
|
||||
1000 (note: Don't include last token!)
|
||||
No, non-final:
|
||||
0010
|
||||
|
||||
Possible combinations: 1000, 0100, 0000, 1001, 0011, 0010,
|
||||
|
||||
We'll name the bits "match", "advance", "retry", "extend"
|
||||
REJECT = 0000
|
||||
MATCH = 1000
|
||||
ADVANCE = 0100
|
||||
RETRY = 0010
|
||||
MATCH_EXTEND = 1001
|
||||
RETRY_EXTEND = 0011
|
||||
MATCH_REJECT = 2000 # Match, but don't include last token
|
||||
|
||||
Problem: If a quantifier is matching, we're adding a lot of open partials
|
||||
'''
|
||||
cdef char is_match
|
||||
is_match = get_is_match(state, token, extra_attrs)
|
||||
quantifier = get_quantifier(state)
|
||||
is_final = get_is_final(state)
|
||||
if quantifier == ZERO:
|
||||
is_match = not is_match
|
||||
quantifier = ONE
|
||||
if quantifier == ONE:
|
||||
if is_match and is_final:
|
||||
# Yes, final: 1000
|
||||
return MATCH
|
||||
elif is_match and not is_final:
|
||||
# Yes, non-final: 0100
|
||||
return ADVANCE
|
||||
elif not is_match and is_final:
|
||||
# No, final: 0000
|
||||
return REJECT
|
||||
else:
|
||||
return REJECT
|
||||
elif quantifier == ZERO_PLUS:
|
||||
if is_match and is_final:
|
||||
# Yes, final: 1001
|
||||
return MATCH_EXTEND
|
||||
elif is_match and not is_final:
|
||||
# Yes, non-final: 0011
|
||||
return RETRY_EXTEND
|
||||
elif not is_match and is_final:
|
||||
# No, final 2000 (note: Don't include last token!)
|
||||
return MATCH_REJECT
|
||||
else:
|
||||
# No, non-final 0010
|
||||
return RETRY
|
||||
elif quantifier == ZERO_ONE:
|
||||
if is_match and is_final:
|
||||
# Yes, final: 1000
|
||||
return MATCH
|
||||
elif is_match and not is_final:
|
||||
# Yes, non-final: 0100
|
||||
return ADVANCE
|
||||
elif not is_match and is_final:
|
||||
# No, final 2000 (note: Don't include last token!)
|
||||
return MATCH_REJECT
|
||||
else:
|
||||
# No, non-final 0010
|
||||
return RETRY
|
||||
|
||||
|
||||
cdef char get_is_match(PatternStateC state, const TokenC* token, const attr_t* extra_attrs) nogil:
|
||||
spec = state.pattern
|
||||
for attr in spec.attrs[:spec.nr_attr]:
|
||||
if get_token_attr(token, attr.attr) != attr.value:
|
||||
return 0
|
||||
else:
|
||||
return 1
|
||||
|
||||
|
||||
cdef char get_is_final(PatternStateC state) nogil:
|
||||
if state.pattern[1].attrs[0].attr == ID and state.pattern[1].nr_attr == 0:
|
||||
return 1
|
||||
else:
|
||||
return 0
|
||||
|
||||
|
||||
cdef char get_quantifier(PatternStateC state) nogil:
|
||||
return state.pattern.quantifier
|
||||
|
||||
|
||||
cdef TokenPatternC* init_pattern(Pool mem, attr_t entity_id,
|
||||
|
|
@ -122,6 +307,7 @@ cdef TokenPatternC* init_pattern(Pool mem, attr_t entity_id,
|
|||
for j, (attr, value) in enumerate(spec):
|
||||
pattern[i].attrs[j].attr = attr
|
||||
pattern[i].attrs[j].value = value
|
||||
pattern[i].key = hash64(pattern[i].attrs, pattern[i].nr_attr * sizeof(AttrValueC), 0)
|
||||
i = len(token_specs)
|
||||
pattern[i].attrs = <AttrValueC*>mem.alloc(2, sizeof(AttrValueC))
|
||||
pattern[i].attrs[0].attr = ID
|
||||
|
|
@ -130,51 +316,16 @@ cdef TokenPatternC* init_pattern(Pool mem, attr_t entity_id,
|
|||
return pattern
|
||||
|
||||
|
||||
cdef attr_t get_pattern_key(const TokenPatternC* pattern) except 0:
|
||||
cdef attr_t get_pattern_key(const TokenPatternC* pattern) nogil:
|
||||
while pattern.nr_attr != 0:
|
||||
pattern += 1
|
||||
id_attr = pattern[0].attrs[0]
|
||||
assert id_attr.attr == ID
|
||||
return id_attr.value
|
||||
|
||||
|
||||
cdef int get_action(const TokenPatternC* pattern, const TokenC* token) nogil:
|
||||
lookahead = &pattern[1]
|
||||
for attr in pattern.attrs[:pattern.nr_attr]:
|
||||
if get_token_attr(token, attr.attr) != attr.value:
|
||||
if pattern.quantifier == ONE:
|
||||
return REJECT
|
||||
elif pattern.quantifier == ZERO:
|
||||
return ACCEPT if lookahead.nr_attr == 0 else ADVANCE
|
||||
elif pattern.quantifier in (ZERO_ONE, ZERO_PLUS):
|
||||
return ACCEPT_PREV if lookahead.nr_attr == 0 else ADVANCE_ZERO
|
||||
else:
|
||||
return PANIC
|
||||
if pattern.quantifier == ZERO:
|
||||
return REJECT
|
||||
elif lookahead.nr_attr == 0:
|
||||
if pattern.quantifier == ZERO_PLUS:
|
||||
return REPEAT
|
||||
else:
|
||||
return ACCEPT
|
||||
elif pattern.quantifier in (ONE, ZERO_ONE):
|
||||
return ADVANCE
|
||||
elif pattern.quantifier == ZERO_PLUS:
|
||||
# This is a bandaid over the 'shadowing' problem described here:
|
||||
# https://github.com/explosion/spaCy/issues/864
|
||||
next_action = get_action(lookahead, token)
|
||||
if next_action is REJECT:
|
||||
return REPEAT
|
||||
else:
|
||||
return ADVANCE_PLUS
|
||||
else:
|
||||
return PANIC
|
||||
|
||||
|
||||
def _convert_strings(token_specs, string_store):
|
||||
# Support 'syntactic sugar' operator '+', as combination of ONE, ZERO_PLUS
|
||||
operators = {'!': (ZERO,), '*': (ZERO_PLUS,), '+': (ONE, ZERO_PLUS),
|
||||
'?': (ZERO_ONE,), '1': (ONE,)}
|
||||
operators = {'*': (ZERO_PLUS,), '+': (ONE, ZERO_PLUS),
|
||||
'?': (ZERO_ONE,), '1': (ONE,), '!': (ZERO,)}
|
||||
tokens = []
|
||||
op = ONE
|
||||
for spec in token_specs:
|
||||
|
|
@ -204,21 +355,6 @@ def _convert_strings(token_specs, string_store):
|
|||
return tokens
|
||||
|
||||
|
||||
def merge_phrase(matcher, doc, i, matches):
|
||||
"""Callback to merge a phrase on match."""
|
||||
ent_id, label, start, end = matches[i]
|
||||
span = doc[start:end]
|
||||
span.merge(ent_type=label, ent_id=ent_id)
|
||||
|
||||
|
||||
def unpickle_matcher(vocab, patterns, callbacks):
|
||||
matcher = Matcher(vocab)
|
||||
for key, specs in patterns.items():
|
||||
callback = callbacks.get(key, None)
|
||||
matcher.add(key, callback, *specs)
|
||||
return matcher
|
||||
|
||||
|
||||
cdef class Matcher:
|
||||
"""Match sequences of tokens, based on pattern rules."""
|
||||
cdef Pool mem
|
||||
|
|
@ -339,7 +475,7 @@ cdef class Matcher:
|
|||
if key not in self._patterns:
|
||||
return default
|
||||
return (self._callbacks[key], self._patterns[key])
|
||||
|
||||
|
||||
def pipe(self, docs, batch_size=1000, n_threads=2):
|
||||
"""Match a stream of documents, yielding them in turn.
|
||||
|
||||
|
|
@ -361,231 +497,9 @@ cdef class Matcher:
|
|||
describing the matches. A match tuple describes a span
|
||||
`doc[start:end]`. The `label_id` and `key` are both integers.
|
||||
"""
|
||||
cdef vector[StateC] partials
|
||||
cdef int n_partials = 0
|
||||
cdef int q = 0
|
||||
cdef int i, token_i
|
||||
cdef const TokenC* token
|
||||
cdef StateC state
|
||||
cdef int j = 0
|
||||
cdef int k
|
||||
cdef bint overlap = False
|
||||
cdef MatchEntryC* state_match
|
||||
cdef MatchEntryC* last_matches = <MatchEntryC*>self.mem.alloc(self.patterns.size(),sizeof(MatchEntryC))
|
||||
|
||||
for i in range(self.patterns.size()):
|
||||
last_matches[i].start = 0
|
||||
last_matches[i].end = 0
|
||||
last_matches[i].offset = 0
|
||||
|
||||
matches = []
|
||||
for token_i in range(doc.length):
|
||||
token = &doc.c[token_i]
|
||||
q = 0
|
||||
# Go over the open matches, extending or finalizing if able.
|
||||
# Otherwise, we over-write them (q doesn't advance)
|
||||
#for state in partials:
|
||||
j=0
|
||||
while j < n_partials:
|
||||
state = partials[j]
|
||||
action = get_action(state.pattern, token)
|
||||
j += 1
|
||||
# Skip patterns that would overlap with an existing match
|
||||
# Patterns overlap an existing match if they point to the
|
||||
# same final state and start between the start and end
|
||||
# of said match.
|
||||
# Different patterns with the same label are allowed to
|
||||
# overlap.
|
||||
state_match = state.last_match
|
||||
if (state.start > state_match.start
|
||||
and state.start < state_match.end):
|
||||
continue
|
||||
if action == PANIC:
|
||||
raise Exception("Error selecting action in matcher")
|
||||
while action == ADVANCE_ZERO:
|
||||
state.pattern += 1
|
||||
action = get_action(state.pattern, token)
|
||||
if action == PANIC:
|
||||
raise Exception("Error selecting action in matcher")
|
||||
|
||||
# ADVANCE_PLUS acts like REPEAT, but also pushes a partial that
|
||||
# acts like and ADVANCE_ZERO
|
||||
if action == ADVANCE_PLUS:
|
||||
state.pattern += 1
|
||||
partials.push_back(state)
|
||||
n_partials += 1
|
||||
state.pattern -= 1
|
||||
action = REPEAT
|
||||
|
||||
if action == ADVANCE:
|
||||
state.pattern += 1
|
||||
|
||||
# Check for partial matches that are at the same spec in the same pattern
|
||||
# Keep the longer of the matches
|
||||
# This ensures that there are never more then 2 partials for every spec
|
||||
# in a pattern (one of which gets pruned in this step)
|
||||
|
||||
overlap=False
|
||||
for i in range(q):
|
||||
if state.pattern == partials[i].pattern and state.start < partials[i].start:
|
||||
partials[i] = state
|
||||
j = i
|
||||
overlap = True
|
||||
break
|
||||
if overlap:
|
||||
continue
|
||||
overlap=False
|
||||
for i in range(q):
|
||||
if state.pattern == partials[i].pattern:
|
||||
overlap = True
|
||||
break
|
||||
if overlap:
|
||||
continue
|
||||
|
||||
|
||||
if action == REPEAT:
|
||||
# Leave the state in the queue, and advance to next slot
|
||||
# (i.e. we don't overwrite -- we want to greedily match
|
||||
# more pattern.
|
||||
partials[q] = state
|
||||
q += 1
|
||||
elif action == REJECT:
|
||||
pass
|
||||
elif action == ADVANCE:
|
||||
partials[q] = state
|
||||
q += 1
|
||||
elif action in (ACCEPT, ACCEPT_PREV):
|
||||
# TODO: What to do about patterns starting with ZERO? Need
|
||||
# to adjust the start position.
|
||||
start = state.start
|
||||
end = token_i+1 if action == ACCEPT else token_i
|
||||
ent_id = state.pattern[1].attrs[0].value
|
||||
label = state.pattern[1].attrs[1].value
|
||||
# Check that this match doesn't overlap with an earlier match.
|
||||
# Only overwrite an earlier match if it is a substring of this
|
||||
# match (i.e. it starts after this match starts).
|
||||
state_match = state.last_match
|
||||
|
||||
if start >= state_match.end:
|
||||
state_match.start = start
|
||||
state_match.end = end
|
||||
state_match.offset = len(matches)
|
||||
matches.append((ent_id,start,end))
|
||||
elif start <= state_match.start and end >= state_match.end:
|
||||
if len(matches) == 0:
|
||||
assert state_match.offset==0
|
||||
state_match.offset = 0
|
||||
matches.append((ent_id,start,end))
|
||||
else:
|
||||
i = state_match.offset
|
||||
matches[i] = (ent_id,start,end)
|
||||
state_match.start = start
|
||||
state_match.end = end
|
||||
else:
|
||||
pass
|
||||
|
||||
partials.resize(q)
|
||||
n_partials = q
|
||||
# Check whether we open any new patterns on this token
|
||||
i=0
|
||||
for pattern in self.patterns:
|
||||
# Skip patterns that would overlap with an existing match
|
||||
# state_match = pattern.last_match
|
||||
state_match = &last_matches[i]
|
||||
i+=1
|
||||
if (token_i > state_match.start
|
||||
and token_i < state_match.end):
|
||||
continue
|
||||
action = get_action(pattern, token)
|
||||
if action == PANIC:
|
||||
raise Exception("Error selecting action in matcher")
|
||||
while action in (ADVANCE_PLUS,ADVANCE_ZERO):
|
||||
if action == ADVANCE_PLUS:
|
||||
state.start = token_i
|
||||
state.pattern = pattern
|
||||
state.last_match = state_match
|
||||
partials.push_back(state)
|
||||
n_partials += 1
|
||||
pattern += 1
|
||||
action = get_action(pattern, token)
|
||||
|
||||
if action == ADVANCE:
|
||||
pattern += 1
|
||||
j=0
|
||||
overlap = False
|
||||
for j in range(q):
|
||||
if pattern == partials[j].pattern:
|
||||
overlap = True
|
||||
break
|
||||
if overlap:
|
||||
continue
|
||||
|
||||
|
||||
if action == REPEAT:
|
||||
state.start = token_i
|
||||
state.pattern = pattern
|
||||
state.last_match = state_match
|
||||
partials.push_back(state)
|
||||
n_partials += 1
|
||||
elif action == ADVANCE:
|
||||
# TODO: What to do about patterns starting with ZERO? Need
|
||||
# to adjust the start position.
|
||||
state.start = token_i
|
||||
state.pattern = pattern
|
||||
state.last_match = state_match
|
||||
partials.push_back(state)
|
||||
n_partials += 1
|
||||
elif action in (ACCEPT, ACCEPT_PREV):
|
||||
start = token_i
|
||||
end = token_i+1 if action == ACCEPT else token_i
|
||||
ent_id = pattern[1].attrs[0].value
|
||||
|
||||
label = pattern[1].attrs[1].value
|
||||
if start >= state_match.end:
|
||||
state_match.start = start
|
||||
state_match.end = end
|
||||
state_match.offset = len(matches)
|
||||
matches.append((ent_id,start,end))
|
||||
if start <= state_match.start and end >= state_match.end:
|
||||
if len(matches) == 0:
|
||||
state_match.offset = 0
|
||||
matches.append((ent_id,start,end))
|
||||
else:
|
||||
j = state_match.offset
|
||||
matches[j] = (ent_id,start,end)
|
||||
state_match.start = start
|
||||
state_match.end = end
|
||||
else:
|
||||
pass
|
||||
|
||||
# Look for open patterns that are actually satisfied
|
||||
for state in partials:
|
||||
while state.pattern.quantifier in (ZERO, ZERO_ONE, ZERO_PLUS):
|
||||
state.pattern += 1
|
||||
if state.pattern.nr_attr == 0:
|
||||
start = state.start
|
||||
end = len(doc)
|
||||
ent_id = state.pattern.attrs[0].value
|
||||
label = state.pattern.attrs[1].value
|
||||
state_match = state.last_match
|
||||
if start >= state_match.end:
|
||||
state_match.start = start
|
||||
state_match.end = end
|
||||
state_match.offset = len(matches)
|
||||
matches.append((ent_id,start,end))
|
||||
if start <= state_match.start and end >= state_match.end:
|
||||
j = state_match.offset
|
||||
if len(matches) == 0:
|
||||
state_match.offset = 0
|
||||
matches.append((ent_id,start,end))
|
||||
else:
|
||||
matches[j] = (ent_id,start,end)
|
||||
state_match.start = start
|
||||
state_match.end = end
|
||||
else:
|
||||
pass
|
||||
for i, (ent_id, start, end) in enumerate(matches):
|
||||
on_match = self._callbacks.get(ent_id)
|
||||
matches = find_matches(&self.patterns[0], self.patterns.size(), doc)
|
||||
for i, (key, start, end) in enumerate(matches):
|
||||
on_match = self._callbacks.get(key, None)
|
||||
if on_match is not None:
|
||||
on_match(self, doc, i, matches)
|
||||
return matches
|
||||
|
|
@ -597,6 +511,26 @@ cdef class Matcher:
|
|||
return key
|
||||
|
||||
|
||||
def unpickle_matcher(vocab, patterns, callbacks):
|
||||
matcher = Matcher(vocab)
|
||||
for key, specs in patterns.items():
|
||||
callback = callbacks.get(key, None)
|
||||
matcher.add(key, callback, *specs)
|
||||
return matcher
|
||||
|
||||
|
||||
def _get_longest_matches(matches):
|
||||
'''Filter out matches that have a longer equivalent.'''
|
||||
longest_matches = {}
|
||||
for pattern_id, start, end in matches:
|
||||
key = (pattern_id, start)
|
||||
length = end-start
|
||||
if key not in longest_matches or length > longest_matches[key]:
|
||||
longest_matches[key] = length
|
||||
return [(pattern_id, start, start+length)
|
||||
for (pattern_id, start), length in longest_matches.items()]
|
||||
|
||||
|
||||
def get_bilou(length):
|
||||
if length == 1:
|
||||
return [U_ENT]
|
||||
|
|
|
|||
|
|
@ -1,685 +0,0 @@
|
|||
# cython: infer_types=True
|
||||
# cython: profile=True
|
||||
from libcpp.vector cimport vector
|
||||
from libc.stdint cimport int32_t, uint64_t, uint16_t
|
||||
from preshed.maps cimport PreshMap
|
||||
from cymem.cymem cimport Pool
|
||||
from murmurhash.mrmr cimport hash64
|
||||
from .typedefs cimport attr_t, hash_t
|
||||
from .structs cimport TokenC
|
||||
from .lexeme cimport attr_id_t
|
||||
from .vocab cimport Vocab
|
||||
from .tokens.doc cimport Doc
|
||||
from .tokens.doc cimport get_token_attr
|
||||
from .attrs cimport ID, attr_id_t, NULL_ATTR
|
||||
from .attrs import IDS
|
||||
from .attrs import FLAG61 as U_ENT
|
||||
from .attrs import FLAG60 as B2_ENT
|
||||
from .attrs import FLAG59 as B3_ENT
|
||||
from .attrs import FLAG58 as B4_ENT
|
||||
from .attrs import FLAG57 as B5_ENT
|
||||
from .attrs import FLAG56 as B6_ENT
|
||||
from .attrs import FLAG55 as B7_ENT
|
||||
from .attrs import FLAG54 as B8_ENT
|
||||
from .attrs import FLAG53 as B9_ENT
|
||||
from .attrs import FLAG52 as B10_ENT
|
||||
from .attrs import FLAG51 as I3_ENT
|
||||
from .attrs import FLAG50 as I4_ENT
|
||||
from .attrs import FLAG49 as I5_ENT
|
||||
from .attrs import FLAG48 as I6_ENT
|
||||
from .attrs import FLAG47 as I7_ENT
|
||||
from .attrs import FLAG46 as I8_ENT
|
||||
from .attrs import FLAG45 as I9_ENT
|
||||
from .attrs import FLAG44 as I10_ENT
|
||||
from .attrs import FLAG43 as L2_ENT
|
||||
from .attrs import FLAG42 as L3_ENT
|
||||
from .attrs import FLAG41 as L4_ENT
|
||||
from .attrs import FLAG40 as L5_ENT
|
||||
from .attrs import FLAG39 as L6_ENT
|
||||
from .attrs import FLAG38 as L7_ENT
|
||||
from .attrs import FLAG37 as L8_ENT
|
||||
from .attrs import FLAG36 as L9_ENT
|
||||
from .attrs import FLAG35 as L10_ENT
|
||||
|
||||
|
||||
cdef enum action_t:
|
||||
REJECT = 0000
|
||||
MATCH = 1000
|
||||
ADVANCE = 0100
|
||||
RETRY = 0010
|
||||
RETRY_EXTEND = 0011
|
||||
MATCH_EXTEND = 1001
|
||||
MATCH_REJECT = 2000
|
||||
|
||||
|
||||
cdef enum quantifier_t:
|
||||
ZERO
|
||||
ZERO_ONE
|
||||
ZERO_PLUS
|
||||
ONE
|
||||
ONE_PLUS
|
||||
|
||||
|
||||
cdef struct AttrValueC:
|
||||
attr_id_t attr
|
||||
attr_t value
|
||||
|
||||
|
||||
cdef struct TokenPatternC:
|
||||
AttrValueC* attrs
|
||||
int32_t nr_attr
|
||||
quantifier_t quantifier
|
||||
hash_t key
|
||||
|
||||
|
||||
cdef struct ActionC:
|
||||
char emit_match
|
||||
char next_state_next_token
|
||||
char next_state_same_token
|
||||
char same_state_next_token
|
||||
|
||||
|
||||
cdef struct PatternStateC:
|
||||
TokenPatternC* pattern
|
||||
int32_t start
|
||||
int32_t length
|
||||
|
||||
|
||||
cdef struct MatchC:
|
||||
attr_t pattern_id
|
||||
int32_t start
|
||||
int32_t length
|
||||
|
||||
|
||||
cdef find_matches(TokenPatternC** patterns, int n, Doc doc):
|
||||
cdef vector[PatternStateC] states
|
||||
cdef vector[MatchC] matches
|
||||
cdef PatternStateC state
|
||||
cdef Pool mem = Pool()
|
||||
# TODO: Prefill this with the extra attribute values.
|
||||
extra_attrs = <attr_t**>mem.alloc(len(doc), sizeof(attr_t*))
|
||||
# Main loop
|
||||
cdef int i, j
|
||||
for i in range(doc.length):
|
||||
for j in range(n):
|
||||
states.push_back(PatternStateC(patterns[j], i, 0))
|
||||
transition_states(states, matches, &doc.c[i], extra_attrs[i])
|
||||
# Handle matches that end in 0-width patterns
|
||||
finish_states(matches, states)
|
||||
return [(matches[i].pattern_id, matches[i].start, matches[i].start+matches[i].length)
|
||||
for i in range(matches.size())]
|
||||
|
||||
|
||||
|
||||
cdef void transition_states(vector[PatternStateC]& states, vector[MatchC]& matches,
|
||||
const TokenC* token, const attr_t* extra_attrs) except *:
|
||||
cdef int q = 0
|
||||
cdef vector[PatternStateC] new_states
|
||||
for i in range(states.size()):
|
||||
action = get_action(states[i], token, extra_attrs)
|
||||
if action == REJECT:
|
||||
continue
|
||||
state = states[i]
|
||||
states[q] = state
|
||||
while action in (RETRY, RETRY_EXTEND):
|
||||
if action == RETRY_EXTEND:
|
||||
new_states.push_back(
|
||||
PatternStateC(pattern=state.pattern, start=state.start,
|
||||
length=state.length+1))
|
||||
states[q].pattern += 1
|
||||
action = get_action(states[q], token, extra_attrs)
|
||||
if action == REJECT:
|
||||
pass
|
||||
elif action == ADVANCE:
|
||||
states[q].pattern += 1
|
||||
states[q].length += 1
|
||||
q += 1
|
||||
else:
|
||||
ent_id = state.pattern[1].attrs.value
|
||||
if action == MATCH:
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start,
|
||||
length=state.length+1))
|
||||
elif action == MATCH_REJECT:
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start,
|
||||
length=state.length))
|
||||
elif action == MATCH_EXTEND:
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start,
|
||||
length=state.length))
|
||||
states[q].length += 1
|
||||
q += 1
|
||||
states.resize(q)
|
||||
for i in range(new_states.size()):
|
||||
states.push_back(new_states[i])
|
||||
|
||||
|
||||
cdef void finish_states(vector[MatchC]& matches, vector[PatternStateC]& states) except *:
|
||||
'''Handle states that end in zero-width patterns.'''
|
||||
cdef PatternStateC state
|
||||
for i in range(states.size()):
|
||||
state = states[i]
|
||||
while get_quantifier(state) in (ZERO_PLUS, ZERO_ONE):
|
||||
is_final = get_is_final(state)
|
||||
if is_final:
|
||||
ent_id = state.pattern[1].attrs.value
|
||||
matches.push_back(
|
||||
MatchC(pattern_id=ent_id, start=state.start, length=state.length))
|
||||
break
|
||||
else:
|
||||
state.pattern += 1
|
||||
|
||||
|
||||
cdef action_t get_action(PatternStateC state, const TokenC* token, const attr_t* extra_attrs) nogil:
|
||||
'''We need to consider:
|
||||
|
||||
a) Does the token match the specification? [Yes, No]
|
||||
b) What's the quantifier? [1, 0+, ?]
|
||||
c) Is this the last specification? [final, non-final]
|
||||
|
||||
We can transition in the following ways:
|
||||
|
||||
a) Do we emit a match?
|
||||
b) Do we add a state with (next state, next token)?
|
||||
c) Do we add a state with (next state, same token)?
|
||||
d) Do we add a state with (same state, next token)?
|
||||
|
||||
We'll code the actions as boolean strings, so 0000 means no to all 4,
|
||||
1000 means match but no states added, etc.
|
||||
|
||||
1:
|
||||
Yes, final:
|
||||
1000
|
||||
Yes, non-final:
|
||||
0100
|
||||
No, final:
|
||||
0000
|
||||
No, non-final
|
||||
0000
|
||||
0+:
|
||||
Yes, final:
|
||||
1001
|
||||
Yes, non-final:
|
||||
0011
|
||||
No, final:
|
||||
1000 (note: Don't include last token!)
|
||||
No, non-final:
|
||||
0010
|
||||
?:
|
||||
Yes, final:
|
||||
1000
|
||||
Yes, non-final:
|
||||
0100
|
||||
No, final:
|
||||
1000 (note: Don't include last token!)
|
||||
No, non-final:
|
||||
0010
|
||||
|
||||
Possible combinations: 1000, 0100, 0000, 1001, 0011, 0010,
|
||||
|
||||
We'll name the bits "match", "advance", "retry", "extend"
|
||||
REJECT = 0000
|
||||
MATCH = 1000
|
||||
ADVANCE = 0100
|
||||
RETRY = 0010
|
||||
MATCH_EXTEND = 1001
|
||||
RETRY_EXTEND = 0011
|
||||
MATCH_REJECT = 2000 # Match, but don't include last token
|
||||
|
||||
Problem: If a quantifier is matching, we're adding a lot of open partials
|
||||
'''
|
||||
cdef char is_match
|
||||
is_match = get_is_match(state, token, extra_attrs)
|
||||
quantifier = get_quantifier(state)
|
||||
is_final = get_is_final(state)
|
||||
if quantifier == ZERO:
|
||||
is_match = not is_match
|
||||
quantifier = ONE
|
||||
if quantifier == ONE:
|
||||
if is_match and is_final:
|
||||
# Yes, final: 1000
|
||||
return MATCH
|
||||
elif is_match and not is_final:
|
||||
# Yes, non-final: 0100
|
||||
return ADVANCE
|
||||
elif not is_match and is_final:
|
||||
# No, final: 0000
|
||||
return REJECT
|
||||
else:
|
||||
return REJECT
|
||||
elif quantifier == ZERO_PLUS:
|
||||
if is_match and is_final:
|
||||
# Yes, final: 1001
|
||||
return MATCH_EXTEND
|
||||
elif is_match and not is_final:
|
||||
# Yes, non-final: 0011
|
||||
return RETRY_EXTEND
|
||||
elif not is_match and is_final:
|
||||
# No, final 2000 (note: Don't include last token!)
|
||||
return MATCH_REJECT
|
||||
else:
|
||||
# No, non-final 0010
|
||||
return RETRY
|
||||
elif quantifier == ZERO_ONE:
|
||||
if is_match and is_final:
|
||||
# Yes, final: 1000
|
||||
return MATCH
|
||||
elif is_match and not is_final:
|
||||
# Yes, non-final: 0100
|
||||
return ADVANCE
|
||||
elif not is_match and is_final:
|
||||
# No, final 2000 (note: Don't include last token!)
|
||||
return MATCH_REJECT
|
||||
else:
|
||||
# No, non-final 0010
|
||||
return RETRY
|
||||
|
||||
|
||||
cdef char get_is_match(PatternStateC state, const TokenC* token, const attr_t* extra_attrs) nogil:
|
||||
spec = state.pattern
|
||||
for attr in spec.attrs[:spec.nr_attr]:
|
||||
if get_token_attr(token, attr.attr) != attr.value:
|
||||
return 0
|
||||
else:
|
||||
return 1
|
||||
|
||||
|
||||
cdef char get_is_final(PatternStateC state) nogil:
|
||||
if state.pattern[1].attrs[0].attr == ID and state.pattern[1].nr_attr == 0:
|
||||
return 1
|
||||
else:
|
||||
return 0
|
||||
|
||||
|
||||
cdef char get_quantifier(PatternStateC state) nogil:
|
||||
return state.pattern.quantifier
|
||||
|
||||
|
||||
cdef TokenPatternC* init_pattern(Pool mem, attr_t entity_id,
|
||||
object token_specs) except NULL:
|
||||
pattern = <TokenPatternC*>mem.alloc(len(token_specs) + 1, sizeof(TokenPatternC))
|
||||
cdef int i
|
||||
for i, (quantifier, spec) in enumerate(token_specs):
|
||||
pattern[i].quantifier = quantifier
|
||||
pattern[i].attrs = <AttrValueC*>mem.alloc(len(spec), sizeof(AttrValueC))
|
||||
pattern[i].nr_attr = len(spec)
|
||||
for j, (attr, value) in enumerate(spec):
|
||||
pattern[i].attrs[j].attr = attr
|
||||
pattern[i].attrs[j].value = value
|
||||
pattern[i].key = hash64(pattern[i].attrs, pattern[i].nr_attr * sizeof(AttrValueC), 0)
|
||||
i = len(token_specs)
|
||||
pattern[i].attrs = <AttrValueC*>mem.alloc(2, sizeof(AttrValueC))
|
||||
pattern[i].attrs[0].attr = ID
|
||||
pattern[i].attrs[0].value = entity_id
|
||||
pattern[i].nr_attr = 0
|
||||
return pattern
|
||||
|
||||
|
||||
cdef attr_t get_pattern_key(const TokenPatternC* pattern) nogil:
|
||||
while pattern.nr_attr != 0:
|
||||
pattern += 1
|
||||
id_attr = pattern[0].attrs[0]
|
||||
return id_attr.value
|
||||
|
||||
def _convert_strings(token_specs, string_store):
|
||||
# Support 'syntactic sugar' operator '+', as combination of ONE, ZERO_PLUS
|
||||
operators = {'*': (ZERO_PLUS,), '+': (ONE, ZERO_PLUS),
|
||||
'?': (ZERO_ONE,), '1': (ONE,), '!': (ZERO,)}
|
||||
tokens = []
|
||||
op = ONE
|
||||
for spec in token_specs:
|
||||
if not spec:
|
||||
# Signifier for 'any token'
|
||||
tokens.append((ONE, [(NULL_ATTR, 0)]))
|
||||
continue
|
||||
token = []
|
||||
ops = (ONE,)
|
||||
for attr, value in spec.items():
|
||||
if isinstance(attr, basestring) and attr.upper() == 'OP':
|
||||
if value in operators:
|
||||
ops = operators[value]
|
||||
else:
|
||||
msg = "Unknown operator '%s'. Options: %s"
|
||||
raise KeyError(msg % (value, ', '.join(operators.keys())))
|
||||
if isinstance(attr, basestring):
|
||||
attr = IDS.get(attr.upper())
|
||||
if isinstance(value, basestring):
|
||||
value = string_store.add(value)
|
||||
if isinstance(value, bool):
|
||||
value = int(value)
|
||||
if attr is not None:
|
||||
token.append((attr, value))
|
||||
for op in ops:
|
||||
tokens.append((op, token))
|
||||
return tokens
|
||||
|
||||
|
||||
cdef class Matcher:
|
||||
"""Match sequences of tokens, based on pattern rules."""
|
||||
cdef Pool mem
|
||||
cdef vector[TokenPatternC*] patterns
|
||||
cdef readonly Vocab vocab
|
||||
cdef public object _patterns
|
||||
cdef public object _entities
|
||||
cdef public object _callbacks
|
||||
|
||||
def __init__(self, vocab):
|
||||
"""Create the Matcher.
|
||||
|
||||
vocab (Vocab): The vocabulary object, which must be shared with the
|
||||
documents the matcher will operate on.
|
||||
RETURNS (Matcher): The newly constructed object.
|
||||
"""
|
||||
self._patterns = {}
|
||||
self._entities = {}
|
||||
self._callbacks = {}
|
||||
self.vocab = vocab
|
||||
self.mem = Pool()
|
||||
|
||||
def __reduce__(self):
|
||||
data = (self.vocab, self._patterns, self._callbacks)
|
||||
return (unpickle_matcher, data, None, None)
|
||||
|
||||
def __len__(self):
|
||||
"""Get the number of rules added to the matcher. Note that this only
|
||||
returns the number of rules (identical with the number of IDs), not the
|
||||
number of individual patterns.
|
||||
|
||||
RETURNS (int): The number of rules.
|
||||
"""
|
||||
return len(self._patterns)
|
||||
|
||||
def __contains__(self, key):
|
||||
"""Check whether the matcher contains rules for a match ID.
|
||||
|
||||
key (unicode): The match ID.
|
||||
RETURNS (bool): Whether the matcher contains rules for this match ID.
|
||||
"""
|
||||
return self._normalize_key(key) in self._patterns
|
||||
|
||||
def add(self, key, on_match, *patterns):
|
||||
"""Add a match-rule to the matcher. A match-rule consists of: an ID
|
||||
key, an on_match callback, and one or more patterns.
|
||||
|
||||
If the key exists, the patterns are appended to the previous ones, and
|
||||
the previous on_match callback is replaced. The `on_match` callback
|
||||
will receive the arguments `(matcher, doc, i, matches)`. You can also
|
||||
set `on_match` to `None` to not perform any actions.
|
||||
|
||||
A pattern consists of one or more `token_specs`, where a `token_spec`
|
||||
is a dictionary mapping attribute IDs to values, and optionally a
|
||||
quantifier operator under the key "op". The available quantifiers are:
|
||||
|
||||
'!': Negate the pattern, by requiring it to match exactly 0 times.
|
||||
'?': Make the pattern optional, by allowing it to match 0 or 1 times.
|
||||
'+': Require the pattern to match 1 or more times.
|
||||
'*': Allow the pattern to zero or more times.
|
||||
|
||||
The + and * operators are usually interpretted "greedily", i.e. longer
|
||||
matches are returned where possible. However, if you specify two '+'
|
||||
and '*' patterns in a row and their matches overlap, the first
|
||||
operator will behave non-greedily. This quirk in the semantics makes
|
||||
the matcher more efficient, by avoiding the need for back-tracking.
|
||||
|
||||
key (unicode): The match ID.
|
||||
on_match (callable): Callback executed on match.
|
||||
*patterns (list): List of token descritions.
|
||||
"""
|
||||
for pattern in patterns:
|
||||
if len(pattern) == 0:
|
||||
msg = ("Cannot add pattern for zero tokens to matcher.\n"
|
||||
"key: {key}\n")
|
||||
raise ValueError(msg.format(key=key))
|
||||
key = self._normalize_key(key)
|
||||
for pattern in patterns:
|
||||
specs = _convert_strings(pattern, self.vocab.strings)
|
||||
self.patterns.push_back(init_pattern(self.mem, key, specs))
|
||||
self._patterns.setdefault(key, [])
|
||||
self._callbacks[key] = on_match
|
||||
self._patterns[key].extend(patterns)
|
||||
|
||||
def remove(self, key):
|
||||
"""Remove a rule from the matcher. A KeyError is raised if the key does
|
||||
not exist.
|
||||
|
||||
key (unicode): The ID of the match rule.
|
||||
"""
|
||||
key = self._normalize_key(key)
|
||||
self._patterns.pop(key)
|
||||
self._callbacks.pop(key)
|
||||
cdef int i = 0
|
||||
while i < self.patterns.size():
|
||||
pattern_key = get_pattern_key(self.patterns.at(i))
|
||||
if pattern_key == key:
|
||||
self.patterns.erase(self.patterns.begin()+i)
|
||||
else:
|
||||
i += 1
|
||||
|
||||
def has_key(self, key):
|
||||
"""Check whether the matcher has a rule with a given key.
|
||||
|
||||
key (string or int): The key to check.
|
||||
RETURNS (bool): Whether the matcher has the rule.
|
||||
"""
|
||||
key = self._normalize_key(key)
|
||||
return key in self._patterns
|
||||
|
||||
def get(self, key, default=None):
|
||||
"""Retrieve the pattern stored for a key.
|
||||
|
||||
key (unicode or int): The key to retrieve.
|
||||
RETURNS (tuple): The rule, as an (on_match, patterns) tuple.
|
||||
"""
|
||||
key = self._normalize_key(key)
|
||||
if key not in self._patterns:
|
||||
return default
|
||||
return (self._callbacks[key], self._patterns[key])
|
||||
|
||||
def pipe(self, docs, batch_size=1000, n_threads=2):
|
||||
"""Match a stream of documents, yielding them in turn.
|
||||
|
||||
docs (iterable): A stream of documents.
|
||||
batch_size (int): Number of documents to accumulate into a working set.
|
||||
n_threads (int): The number of threads with which to work on the buffer
|
||||
in parallel, if the implementation supports multi-threading.
|
||||
YIELDS (Doc): Documents, in order.
|
||||
"""
|
||||
for doc in docs:
|
||||
self(doc)
|
||||
yield doc
|
||||
|
||||
def __call__(self, Doc doc):
|
||||
"""Find all token sequences matching the supplied pattern.
|
||||
|
||||
doc (Doc): The document to match over.
|
||||
RETURNS (list): A list of `(key, start, end)` tuples,
|
||||
describing the matches. A match tuple describes a span
|
||||
`doc[start:end]`. The `label_id` and `key` are both integers.
|
||||
"""
|
||||
matches = find_matches(&self.patterns[0], self.patterns.size(), doc)
|
||||
for i, (key, start, end) in enumerate(matches):
|
||||
on_match = self._callbacks.get(key, None)
|
||||
if on_match is not None:
|
||||
on_match(self, doc, i, matches)
|
||||
return matches
|
||||
|
||||
def _normalize_key(self, key):
|
||||
if isinstance(key, basestring):
|
||||
return self.vocab.strings.add(key)
|
||||
else:
|
||||
return key
|
||||
|
||||
|
||||
def unpickle_matcher(vocab, patterns, callbacks):
|
||||
matcher = Matcher(vocab)
|
||||
for key, specs in patterns.items():
|
||||
callback = callbacks.get(key, None)
|
||||
matcher.add(key, callback, *specs)
|
||||
return matcher
|
||||
|
||||
|
||||
def _get_longest_matches(matches):
|
||||
'''Filter out matches that have a longer equivalent.'''
|
||||
longest_matches = {}
|
||||
for pattern_id, start, end in matches:
|
||||
key = (pattern_id, start)
|
||||
length = end-start
|
||||
if key not in longest_matches or length > longest_matches[key]:
|
||||
longest_matches[key] = length
|
||||
return [(pattern_id, start, start+length)
|
||||
for (pattern_id, start), length in longest_matches.items()]
|
||||
|
||||
|
||||
def get_bilou(length):
|
||||
if length == 1:
|
||||
return [U_ENT]
|
||||
elif length == 2:
|
||||
return [B2_ENT, L2_ENT]
|
||||
elif length == 3:
|
||||
return [B3_ENT, I3_ENT, L3_ENT]
|
||||
elif length == 4:
|
||||
return [B4_ENT, I4_ENT, I4_ENT, L4_ENT]
|
||||
elif length == 5:
|
||||
return [B5_ENT, I5_ENT, I5_ENT, I5_ENT, L5_ENT]
|
||||
elif length == 6:
|
||||
return [B6_ENT, I6_ENT, I6_ENT, I6_ENT, I6_ENT, L6_ENT]
|
||||
elif length == 7:
|
||||
return [B7_ENT, I7_ENT, I7_ENT, I7_ENT, I7_ENT, I7_ENT, L7_ENT]
|
||||
elif length == 8:
|
||||
return [B8_ENT, I8_ENT, I8_ENT, I8_ENT, I8_ENT, I8_ENT, I8_ENT, L8_ENT]
|
||||
elif length == 9:
|
||||
return [B9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT, I9_ENT,
|
||||
L9_ENT]
|
||||
elif length == 10:
|
||||
return [B10_ENT, I10_ENT, I10_ENT, I10_ENT, I10_ENT, I10_ENT, I10_ENT,
|
||||
I10_ENT, I10_ENT, L10_ENT]
|
||||
else:
|
||||
raise ValueError("Max length currently 10 for phrase matching")
|
||||
|
||||
|
||||
cdef class PhraseMatcher:
|
||||
cdef Pool mem
|
||||
cdef Vocab vocab
|
||||
cdef Matcher matcher
|
||||
cdef PreshMap phrase_ids
|
||||
cdef int max_length
|
||||
cdef attr_t* _phrase_key
|
||||
cdef public object _callbacks
|
||||
cdef public object _patterns
|
||||
|
||||
def __init__(self, Vocab vocab, max_length=10):
|
||||
self.mem = Pool()
|
||||
self._phrase_key = <attr_t*>self.mem.alloc(max_length, sizeof(attr_t))
|
||||
self.max_length = max_length
|
||||
self.vocab = vocab
|
||||
self.matcher = Matcher(self.vocab)
|
||||
self.phrase_ids = PreshMap()
|
||||
abstract_patterns = []
|
||||
for length in range(1, max_length):
|
||||
abstract_patterns.append([{tag: True}
|
||||
for tag in get_bilou(length)])
|
||||
self.matcher.add('Candidate', None, *abstract_patterns)
|
||||
self._callbacks = {}
|
||||
|
||||
def __len__(self):
|
||||
"""Get the number of rules added to the matcher. Note that this only
|
||||
returns the number of rules (identical with the number of IDs), not the
|
||||
number of individual patterns.
|
||||
|
||||
RETURNS (int): The number of rules.
|
||||
"""
|
||||
return len(self.phrase_ids)
|
||||
|
||||
def __contains__(self, key):
|
||||
"""Check whether the matcher contains rules for a match ID.
|
||||
|
||||
key (unicode): The match ID.
|
||||
RETURNS (bool): Whether the matcher contains rules for this match ID.
|
||||
"""
|
||||
cdef hash_t ent_id = self.matcher._normalize_key(key)
|
||||
return ent_id in self._callbacks
|
||||
|
||||
def __reduce__(self):
|
||||
return (self.__class__, (self.vocab,), None, None)
|
||||
|
||||
def add(self, key, on_match, *docs):
|
||||
"""Add a match-rule to the matcher. A match-rule consists of: an ID
|
||||
key, an on_match callback, and one or more patterns.
|
||||
|
||||
key (unicode): The match ID.
|
||||
on_match (callable): Callback executed on match.
|
||||
*docs (Doc): `Doc` objects representing match patterns.
|
||||
"""
|
||||
cdef Doc doc
|
||||
for doc in docs:
|
||||
if len(doc) >= self.max_length:
|
||||
msg = (
|
||||
"Pattern length (%d) >= phrase_matcher.max_length (%d). "
|
||||
"Length can be set on initialization, up to 10."
|
||||
)
|
||||
raise ValueError(msg % (len(doc), self.max_length))
|
||||
cdef hash_t ent_id = self.matcher._normalize_key(key)
|
||||
self._callbacks[ent_id] = on_match
|
||||
cdef int length
|
||||
cdef int i
|
||||
cdef hash_t phrase_hash
|
||||
for doc in docs:
|
||||
length = doc.length
|
||||
tags = get_bilou(length)
|
||||
for i in range(self.max_length):
|
||||
self._phrase_key[i] = 0
|
||||
for i, tag in enumerate(tags):
|
||||
lexeme = self.vocab[doc.c[i].lex.orth]
|
||||
lexeme.set_flag(tag, True)
|
||||
self._phrase_key[i] = lexeme.orth
|
||||
phrase_hash = hash64(self._phrase_key,
|
||||
self.max_length * sizeof(attr_t), 0)
|
||||
self.phrase_ids.set(phrase_hash, <void*>ent_id)
|
||||
|
||||
def __call__(self, Doc doc):
|
||||
"""Find all sequences matching the supplied patterns on the `Doc`.
|
||||
|
||||
doc (Doc): The document to match over.
|
||||
RETURNS (list): A list of `(key, start, end)` tuples,
|
||||
describing the matches. A match tuple describes a span
|
||||
`doc[start:end]`. The `label_id` and `key` are both integers.
|
||||
"""
|
||||
matches = []
|
||||
for _, start, end in self.matcher(doc):
|
||||
ent_id = self.accept_match(doc, start, end)
|
||||
if ent_id is not None:
|
||||
matches.append((ent_id, start, end))
|
||||
for i, (ent_id, start, end) in enumerate(matches):
|
||||
on_match = self._callbacks.get(ent_id)
|
||||
if on_match is not None:
|
||||
on_match(self, doc, i, matches)
|
||||
return matches
|
||||
|
||||
def pipe(self, stream, batch_size=1000, n_threads=2):
|
||||
"""Match a stream of documents, yielding them in turn.
|
||||
|
||||
docs (iterable): A stream of documents.
|
||||
batch_size (int): Number of documents to accumulate into a working set.
|
||||
n_threads (int): The number of threads with which to work on the buffer
|
||||
in parallel, if the implementation supports multi-threading.
|
||||
YIELDS (Doc): Documents, in order.
|
||||
"""
|
||||
for doc in stream:
|
||||
self(doc)
|
||||
yield doc
|
||||
|
||||
def accept_match(self, Doc doc, int start, int end):
|
||||
assert (end - start) < self.max_length
|
||||
cdef int i, j
|
||||
for i in range(self.max_length):
|
||||
self._phrase_key[i] = 0
|
||||
for i, j in enumerate(range(start, end)):
|
||||
self._phrase_key[i] = doc.c[j].lex.orth
|
||||
cdef hash_t key = hash64(self._phrase_key,
|
||||
self.max_length * sizeof(attr_t), 0)
|
||||
ent_id = <hash_t>self.phrase_ids.get(key)
|
||||
if ent_id == 0:
|
||||
return None
|
||||
else:
|
||||
return ent_id
|
||||
Loading…
Reference in New Issue
Block a user