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* Refactor arc_eager to use new TransitionSystem base class. Need to fix oracle
This commit is contained in:
Matthew Honnibal
parent
b063001596
commit
8eadb984cb
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@ -4,25 +4,8 @@ from thinc.typedefs cimport weight_t
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from ._state cimport State
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from .transition_system cimport TransitionSystem, Transition
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cdef struct Transition:
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int clas
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int move
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int label
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int cost
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weight_t score
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cdef class TransitionSystem:
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cdef Pool mem
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cdef readonly int n_moves
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cdef dict label_ids
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cdef const Transition* _moves
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cdef Transition best_valid(self, const weight_t* scores, const State* s) except *
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cdef Transition best_gold(self, Transition* guess, const weight_t* scores,
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const State* s,
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const int* gold_heads, const int* gold_labels) except *
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cdef int transition(self, State *s, const Transition* t) except -1
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cdef class ArcEager(TransitionSystem):
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pass
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@ -8,11 +8,17 @@ from ._state cimport head_in_stack, children_in_stack
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from ..structs cimport TokenC
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from .transition_system cimport do_func_t, get_cost_func_t
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from .conll cimport GoldParse
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DEF NON_MONOTONIC = True
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DEF USE_BREAK = True
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cdef weight_t MIN_SCORE = -90000
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# Break transition from here
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# http://www.aclweb.org/anthology/P13-1074
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cdef enum:
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SHIFT
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REDUCE
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@ -21,8 +27,150 @@ cdef enum:
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BREAK
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N_MOVES
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# Break transition from here
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# http://www.aclweb.org/anthology/P13-1074
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cdef do_func_t[N_MOVES] do_funcs
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cdef get_cost_func_t[N_MOVES] get_cost_funcs
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cdef class ArcEager(TransitionSystem):
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cdef Transition init_transition(self, int clas, int move, int label) except *:
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return Transition(
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score=0,
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clas=i,
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move=move,
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label=label,
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do=do_funcs[move],
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get_cost=get_cost_funcs[move])
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cdef Transition best_valid(self, const weight_t* scores, const State* s) except *:
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cdef bint[N_MOVES] is_valid
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is_valid[SHIFT] = _can_shift(s)
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is_valid[REDUCE] = _can_reduce(s)
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is_valid[LEFT] = _can_left(s)
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is_valid[RIGHT] = _can_right(s)
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is_valid[BREAK] = _can_break(s)
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cdef Transition best
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cdef weight_t score = MIN_SCORE
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cdef int i
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for i in range(self.n_moves):
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if scores[i] > score and is_valid[self.c[i].move]:
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best = self.c[i]
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score = scores[i]
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# Label Shift moves with the best Right-Arc label, for non-monotonic
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# actions
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if best.move == SHIFT:
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score = MIN_SCORE
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for i in range(self.n_moves):
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if self.c[i].move == RIGHT and scores[i] > score:
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best.label = self.c[i].label
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score = scores[i]
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return best
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cdef int _do_shift(const Transition* self, State* state) except -1:
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# Set the dep label, in case we need it after we reduce
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if NON_MONOTONIC:
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get_s0(state).dep = self.label
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push_stack(state)
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cdef int _do_left(const Transition* self, State* state) except -1:
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add_dep(state, state.i, state.stack[0], self.label)
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pop_stack(state)
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cdef int _do_right(const Transition* self, State* state) except -1:
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add_dep(state, state.stack[0], state.i, self.label)
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push_stack(state)
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cdef int _do_reduce(const Transition* self, State* state) except -1:
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# TODO: Huh? Is this some weirdness from the non-monotonic?
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add_dep(state, state.stack[-1], state.stack[0], get_s0(state).dep)
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pop_stack(state)
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cdef int _do_break(const Transition* self, State* state) except -1:
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state.sent[state.i-1].sent_end = True
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while state.stack_len != 0:
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if get_s0(state).head == 0:
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get_s0(state).dep = 0
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state.stack -= 1
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state.stack_len -= 1
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if not at_eol(state):
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push_stack(state)
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do_funcs[SHIFT] = _do_shift
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do_funcs[REDUCE] = _do_reduce
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do_funcs[LEFT] = _do_left
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do_funcs[RIGHT] = _do_right
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do_funcs[BREAK] = _do_break
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cdef int _shift_cost(const Transition* self, const State* s, GoldParse gold) except -1:
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assert not at_eol(s)
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cost = 0
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cost += head_in_stack(s, s.i, gold.heads)
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cost += children_in_stack(s, s.i, gold.heads)
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if NON_MONOTONIC:
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cost += gold[s.stack[0]] == s.i
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# If we can break, and there's no cost to doing so, we should
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if _can_break(s) and _break_cost(self, s, gold) == 0:
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cost += 1
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return cost
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cdef int _right_cost(const Transition* self, const State* s, GoldParse gold) except -1:
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assert s.stack_len >= 1
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cost = 0
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if gold[s.i] == s.stack[0]:
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return cost
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cost += head_in_buffer(s, s.i, gold.heads)
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cost += children_in_stack(s, s.i, gold.heads)
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cost += head_in_stack(s, s.i, gold.heads)
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if NON_MONOTONIC:
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cost += gold[s.stack[0]] == s.i
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return cost
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cdef int _left_cost(const Transition* self, const State* s, GoldParse gold) except -1:
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assert s.stack_len >= 1
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cost = 0
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if gold[s.stack[0]] == s.i:
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return cost
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cost += head_in_buffer(s, s.stack[0], gold.heads)
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cost += children_in_buffer(s, s.stack[0], gold.heads)
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if NON_MONOTONIC and s.stack_len >= 2:
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cost += gold[s.stack[0]] == s.stack[-1]
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cost += gold[s.stack[0]] == s.stack[0]
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return cost
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cdef int _reduce_cost(const Transition* self, const State* s, GoldParse gold) except -1:
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cdef int cost = 0
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cost += children_in_buffer(s, s.stack[0], gold.heads)
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if NON_MONOTONIC:
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cost += head_in_buffer(s, s.stack[0], gold.heads)
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return cost
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cdef int _break_cost(const Transition* self, const State* s, GoldParse gold) except -1:
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# When we break, we Reduce all of the words on the stack.
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cdef int cost = 0
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# Number of deps between S0...Sn and N0...Nn
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for i in range(s.i, s.sent_len):
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cost += children_in_stack(s, i, gold.heads)
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cost += head_in_stack(s, i, gold.heads)
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return cost
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get_cost_funcs[SHIFT] = _shift_cost
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get_cost_funcs[REDUCE] = _reduce_cost
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get_cost_funcs[LEFT] = _left_cost
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get_cost_funcs[RIGHT] = _right_cost
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get_cost_funcs[BREAK] = _break_cost
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cdef inline bint _can_shift(const State* s) nogil:
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@ -63,224 +211,3 @@ cdef inline bint _can_break(const State* s) nogil:
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else:
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seen_headless = True
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return True
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cdef int _shift_cost(const State* s, const int* gold) except -1:
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assert not at_eol(s)
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cost = 0
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cost += head_in_stack(s, s.i, gold)
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cost += children_in_stack(s, s.i, gold)
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if NON_MONOTONIC:
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cost += gold[s.stack[0]] == s.i
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# If we can break, and there's no cost to doing so, we should
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if _can_break(s) and _break_cost(s, gold) == 0:
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cost += 1
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return cost
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cdef int _right_cost(const State* s, const int* gold) except -1:
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assert s.stack_len >= 1
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cost = 0
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if gold[s.i] == s.stack[0]:
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return cost
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cost += head_in_buffer(s, s.i, gold)
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cost += children_in_stack(s, s.i, gold)
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cost += head_in_stack(s, s.i, gold)
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if NON_MONOTONIC:
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cost += gold[s.stack[0]] == s.i
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return cost
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cdef int _left_cost(const State* s, const int* gold) except -1:
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assert s.stack_len >= 1
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cost = 0
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if gold[s.stack[0]] == s.i:
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return cost
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cost += head_in_buffer(s, s.stack[0], gold)
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cost += children_in_buffer(s, s.stack[0], gold)
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if NON_MONOTONIC and s.stack_len >= 2:
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cost += gold[s.stack[0]] == s.stack[-1]
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cost += gold[s.stack[0]] == s.stack[0]
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return cost
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cdef int _reduce_cost(const State* s, const int* gold) except -1:
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cdef int cost = 0
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cost += children_in_buffer(s, s.stack[0], gold)
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if NON_MONOTONIC:
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cost += head_in_buffer(s, s.stack[0], gold)
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return cost
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cdef int _break_cost(const State* s, const int* gold) except -1:
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# When we break, we Reduce all of the words on the stack.
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cdef int cost = 0
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# Number of deps between S0...Sn and N0...Nn
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for i in range(s.i, s.sent_len):
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cost += children_in_stack(s, i, gold)
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cost += head_in_stack(s, i, gold)
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return cost
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cdef class ArcEager(TransitionSystem):
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def __init__(self, list left_labels, list right_labels):
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self.mem = Pool()
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left_labels.sort()
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right_labels.sort()
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if 'ROOT' in right_labels:
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right_labels.pop(right_labels.index('ROOT'))
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if 'ROOT' in left_labels:
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left_labels.pop(left_labels.index('ROOT'))
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self.n_moves = 3 + len(left_labels) + len(right_labels)
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moves = <Transition*>self.mem.alloc(self.n_moves, sizeof(Transition))
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cdef int i = 0
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moves[i].move = SHIFT
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moves[i].label = 0
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moves[i].clas = i
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i += 1
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moves[i].move = REDUCE
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moves[i].label = 0
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moves[i].clas = i
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i += 1
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self.label_ids = {'ROOT': 0}
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cdef int label_id
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for label_str in left_labels:
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label_str = unicode(label_str)
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label_id = self.label_ids.setdefault(label_str, len(self.label_ids))
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moves[i].move = LEFT
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moves[i].label = label_id
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moves[i].clas = i
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i += 1
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for label_str in right_labels:
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label_str = unicode(label_str)
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label_id = self.label_ids.setdefault(label_str, len(self.label_ids))
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moves[i].move = RIGHT
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moves[i].label = label_id
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moves[i].clas = i
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i += 1
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moves[i].move = BREAK
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moves[i].label = 0
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moves[i].clas = i
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i += 1
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self.c = moves
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cdef int transition(self, State *s, const Transition* t) except -1:
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if t.move == SHIFT:
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# Set the dep label, in case we need it after we reduce
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if NON_MONOTONIC:
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s.sent[s.i].dep = t.label
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push_stack(s)
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elif t.move == LEFT:
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add_dep(s, s.i, s.stack[0], t.label)
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pop_stack(s)
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elif t.move == RIGHT:
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add_dep(s, s.stack[0], s.i, t.label)
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push_stack(s)
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elif t.move == REDUCE:
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# TODO: Huh? Is this some weirdness from the non-monotonic?
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add_dep(s, s.stack[-1], s.stack[0], get_s0(s).dep)
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pop_stack(s)
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elif t.move == BREAK:
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s.sent[s.i-1].sent_end = True
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while s.stack_len != 0:
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if get_s0(s).head == 0:
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get_s0(s).dep = 0
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s.stack -= 1
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s.stack_len -= 1
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if not at_eol(s):
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push_stack(s)
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else:
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raise Exception(t.move)
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cdef Transition best_valid(self, const weight_t* scores, const State* s) except *:
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cdef bint[N_MOVES] valid
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valid[SHIFT] = _can_shift(s)
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valid[LEFT] = _can_left(s)
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valid[RIGHT] = _can_right(s)
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valid[REDUCE] = _can_reduce(s)
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valid[BREAK] = _can_break(s)
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cdef int best = -1
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cdef weight_t score = 0
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cdef weight_t best_r_score = -9000
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cdef int best_r_label = -1
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cdef int i
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for i in range(self.n_moves):
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if valid[self._moves[i].move] and (best == -1 or scores[i] > score):
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best = i
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score = scores[i]
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if self._moves[i].move == RIGHT and scores[i] > best_r_score:
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best_r_label = self._moves[i].label
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assert best >= 0
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cdef Transition t = self._moves[best]
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t.score = score
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if t.move == SHIFT:
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t.label = best_r_label
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return t
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cdef Transition best_gold(self, Transition* guess, const weight_t* scores,
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const State* s,
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const int* gold_heads, const int* gold_labels) except *:
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# If we can create a gold dependency, only one action can be correct
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cdef int[N_MOVES] unl_costs
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unl_costs[SHIFT] = _shift_cost(s, gold_heads) if _can_shift(s) else -1
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unl_costs[LEFT] = _left_cost(s, gold_heads) if _can_left(s) else -1
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unl_costs[RIGHT] = _right_cost(s, gold_heads) if _can_right(s) else -1
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unl_costs[REDUCE] = _reduce_cost(s, gold_heads) if _can_reduce(s) else -1
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unl_costs[BREAK] = _break_cost(s, gold_heads) if _can_break(s) else -1
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guess.cost = unl_costs[guess.move]
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cdef Transition t
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cdef int target_label
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cdef int i
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if gold_heads[s.stack[0]] == s.i:
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target_label = gold_labels[s.stack[0]]
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if guess.move == LEFT:
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guess.cost += guess.label != target_label
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for i in range(self.n_moves):
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t = self._moves[i]
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if t.move == LEFT and t.label == target_label:
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return t
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elif gold_heads[s.i] == s.stack[0]:
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target_label = gold_labels[s.i]
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if guess.move == RIGHT:
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if unl_costs[guess.move] != 0:
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guess.cost += guess.label != target_label
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for i in range(self.n_moves):
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t = self._moves[i]
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if t.label == target_label and unl_costs[t.move] == 0:
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return t
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cdef int best = -1
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cdef weight_t score = -9000
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for i in range(self.n_moves):
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t = self._moves[i]
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if unl_costs[t.move] == 0 and (best == -1 or scores[i] > score):
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best = i
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score = scores[i]
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t = self._moves[best]
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t.score = score
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if best < 0:
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msg = ("No gold move found for configuration.\n"
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"Is the gold-standard parse a projective tree?\n"
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"S unl cost: %d\n"
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"D unl cost: %d\n"
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"L unl cost: %d\n"
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"R unl cost: %d\n"
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"S0, S0 gold: %d, %d\n"
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"N0, N0 gold: %d, %d\n"
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)
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fields = [unl_costs[SHIFT], unl_costs[REDUCE], unl_costs[LEFT],
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unl_costs[RIGHT],
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s.stack[0], gold_heads[s.stack[0]],
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s.i, gold_heads[s.i]]
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raise OracleError(msg % tuple(fields))
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return t
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class OracleError(Exception):
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pass
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@ -3,7 +3,7 @@ from thinc.typedefs cimport weight_t
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from ..structs cimport TokenC
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from ._state cimport State
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from .conll cimport GoldParse
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cdef struct Transition:
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@ -12,20 +12,14 @@ cdef struct Transition:
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int label
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weight_t score
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int cost
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int (*get_cost)(const Transition* self, const State* state, const TokenC* gold) except -1
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int (*is_valid)(const Transition* self, const State* state) except -1
|
||||
|
||||
int (*get_cost)(const Transition* self, const State* state, GoldParse gold) except -1
|
||||
int (*do)(const Transition* self, State* state) except -1
|
||||
|
||||
|
||||
ctypedef int (*get_cost_func_t)(const Transition* self, const State* state,
|
||||
const TokenC* gold) except -1
|
||||
GoldParse gold) except -1
|
||||
|
||||
ctypedef int (*is_valid_func_t)(const Transition* self, const State* state) except -1
|
||||
|
||||
ctypedef int (*do_func_t)(const Transition* self, State* state) except -1
|
||||
|
||||
|
||||
|
|
@ -39,4 +33,4 @@ cdef class TransitionSystem:
|
|||
cdef const Transition best_valid(self, const weight_t*, const State*) except *
|
||||
|
||||
cdef const Transition best_gold(self, const weight_t*, const State*,
|
||||
const TokenC*) except *
|
||||
GoldParse gold) except *
|
||||
|
|
|
|||
|
|
@ -25,22 +25,7 @@ cdef class TransitionSystem:
|
|||
raise NotImplementedError
|
||||
|
||||
cdef Transition best_valid(self, const weight_t* scores, const State* s) except *:
|
||||
cdef Transition best
|
||||
cdef weight_t score = MIN_SCORE
|
||||
cdef int i
|
||||
for i in range(self.n_moves):
|
||||
if scores[i] > score and self.c[i].is_valid(&self.c[i], s):
|
||||
best = self.c[i]
|
||||
score = scores[i]
|
||||
# Label Shift moves with the best Right-Arc label, for non-monotonic
|
||||
# actions
|
||||
#if best.move == SHIFT:
|
||||
# score = MIN_SCORE
|
||||
# for i in range(self.n_moves):
|
||||
# if self.c[i].move == RIGHT and scores[i] > score:
|
||||
# best.label = self.c[i].label
|
||||
# score = scores[i]
|
||||
return best
|
||||
raise NotImplementedError
|
||||
|
||||
cdef Transition best_gold(self, const weight_t* scores, const State* s,
|
||||
const TokenC* gold) except *:
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user