mirror of https://github.com/explosion/spaCy.git
37 lines
1001 B
Python
37 lines
1001 B
Python
from typing import List
|
|
|
|
from thinc.api import Model
|
|
from thinc.types import Floats2d
|
|
|
|
from spacy.tokens import Doc
|
|
from spacy.util import registry
|
|
|
|
|
|
@registry.architectures("test.LazyInitTok2Vec.v1")
|
|
def build_lazy_init_tok2vec(*, width: int) -> Model[List[Doc], List[Floats2d]]:
|
|
"""tok2vec model of which the output size is only known after
|
|
initialization. This implementation does not output meaningful
|
|
embeddings, it is strictly for testing."""
|
|
return Model(
|
|
"lazy_init_tok2vec",
|
|
lazy_init_tok2vec_forward,
|
|
init=lazy_init_tok2vec_init,
|
|
dims={"nO": None},
|
|
attrs={"width": width},
|
|
)
|
|
|
|
|
|
def lazy_init_tok2vec_init(model: Model, X=None, Y=None):
|
|
width = model.attrs["width"]
|
|
model.set_dim("nO", width)
|
|
|
|
|
|
def lazy_init_tok2vec_forward(model: Model, X: List[Doc], is_train: bool):
|
|
width = model.get_dim("nO")
|
|
Y = [model.ops.alloc2f(len(doc), width) for doc in X]
|
|
|
|
def backprop(dY):
|
|
return []
|
|
|
|
return Y, backprop
|