spaCy/spacy/syntax/transition_system.pyx

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from cymem.cymem cimport Pool
from ._state cimport State
from ..structs cimport TokenC
from thinc.typedefs cimport weight_t
cdef weight_t MIN_SCORE = -90000
class OracleError(Exception):
pass
cdef class TransitionSystem:
def __init__(self, StringStore string_table, dict labels_by_action):
self.mem = Pool()
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self.n_moves = sum(len(labels) for labels in labels_by_action.values())
moves = <Transition*>self.mem.alloc(self.n_moves, sizeof(Transition))
cdef int i = 0
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cdef int label_id
self.strings = string_table
for action, label_strs in sorted(labels_by_action.items()):
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for label_str in sorted(label_strs):
label_id = self.strings[unicode(label_str)] if label_str else 0
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moves[i] = self.init_transition(i, int(action), label_id)
i += 1
self.c = moves
cdef int first_state(self, State* state) except -1:
raise NotImplementedError
cdef int preprocess_gold(self, GoldParse gold) except -1:
raise NotImplementedError
cdef Transition lookup_transition(self, object name) except *:
raise NotImplementedError
cdef Transition init_transition(self, int clas, int move, int label) except *:
raise NotImplementedError
cdef Transition best_valid(self, const weight_t* scores, const State* s) except *:
raise NotImplementedError
cdef Transition best_gold(self, const weight_t* scores, const State* s,
GoldParse gold) except *:
cdef Transition best
cdef weight_t score = MIN_SCORE
cdef int i
for i in range(self.n_moves):
cost = self.c[i].get_cost(&self.c[i], s, gold)
if scores[i] > score and cost == 0:
best = self.c[i]
score = scores[i]
assert score > MIN_SCORE
return best
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#cdef class PyState:
# """Provide a Python class for testing purposes."""
# def __init__(self, GoldParse gold):
# self.mem = Pool()
# self.system = EntityRecognition(labels)
# self._state = init_state(self.mem, tokens, gold.length)
#
# def transition(self, name):
# cdef const Transition* trans = self._transition_by_name(name)
# trans.do(trans, self._state)
#
# def is_valid(self, name):
# cdef const Transition* trans = self._transition_by_name(name)
# return _is_valid(trans.move, trans.label, self._state)
#
# def is_gold(self, name):
# cdef const Transition* trans = self._transition_by_name(name)
# return _get_const(trans, self._state, self._gold)
#
# property ent:
# def __get__(self):
# pass
#
# property n_ents:
# def __get__(self):
# pass
#
# property i:
# def __get__(self):
# pass
#
# property open_entity:
# def __get__(self):
# return entity_is_open(self._s)