mirror of https://github.com/explosion/spaCy.git
34 lines
1004 B
Python
34 lines
1004 B
Python
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from pydantic import StrictInt
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from spacy.util import registry
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from spacy.ml._layers import PrecomputableAffine
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from spacy.syntax._parser_model import ParserModel
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from thinc.api import Model, chain, list2array, Linear, zero_init, use_ops
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@registry.architectures.register("spacy.TransitionBasedParser.v1")
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def build_tb_parser_model(
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tok2vec: Model,
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nr_feature_tokens: StrictInt,
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hidden_width: StrictInt,
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maxout_pieces: StrictInt,
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nO=None,
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):
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token_vector_width = tok2vec.get_dim("nO")
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tok2vec = chain(tok2vec, list2array())
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tok2vec.set_dim("nO", token_vector_width)
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lower = PrecomputableAffine(
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nO=hidden_width,
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nF=nr_feature_tokens,
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nI=tok2vec.get_dim("nO"),
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nP=maxout_pieces,
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)
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lower.set_dim("nP", maxout_pieces)
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with use_ops("numpy"):
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# Initialize weights at zero, as it's a classification layer.
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upper = Linear(nO=nO, init_W=zero_init)
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model = ParserModel(tok2vec, lower, upper)
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return model
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