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rewrite Maxout layer as separate layers to avoid shape inference trouble (#6760)

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Sofie Van Landeghem 2021-01-19 00:37:17 +01:00 committed by GitHub
parent 26c34ab8b0
commit c8761b0e6e
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1 changed files with 6 additions and 3 deletions
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9
spacy/ml/models/textcat.py
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@ -4,7 +4,7 @@ from thinc.types import Floats2d
from thinc.api import Model, reduce_mean, Linear, list2ragged, Logistic
from thinc.api import chain, concatenate, clone, Dropout, ParametricAttention
from thinc.api import SparseLinear, Softmax, softmax_activation, Maxout, reduce_sum
from thinc.api import with_cpu, Relu, residual
from thinc.api import with_cpu, Relu, residual, LayerNorm
from thinc.layers.chain import init as init_chain
from ...attrs import ORTH
@ -72,13 +72,14 @@ def build_text_classifier_v2(
attention_layer = ParametricAttention(
width
) # TODO: benchmark performance difference of this layer
maxout_layer = Maxout(nO=width, nI=width, dropout=0.0, normalize=True)
maxout_layer = Maxout(nO=width, nI=width)
norm_layer = LayerNorm(nI=width)
cnn_model = (
tok2vec
>> list2ragged()
>> attention_layer
>> reduce_sum()
>> residual(maxout_layer)
>> residual(maxout_layer >> norm_layer >> Dropout(0.0))
)
nO_double = nO * 2 if nO else None
@ -93,6 +94,7 @@ def build_text_classifier_v2(
model.set_ref("output_layer", linear_model.get_ref("output_layer"))
model.set_ref("attention_layer", attention_layer)
model.set_ref("maxout_layer", maxout_layer)
model.set_ref("norm_layer", norm_layer)
model.attrs["multi_label"] = not exclusive_classes
model.init = init_ensemble_textcat
@ -104,6 +106,7 @@ def init_ensemble_textcat(model, X, Y) -> Model:
model.get_ref("attention_layer").set_dim("nO", tok2vec_width)
model.get_ref("maxout_layer").set_dim("nO", tok2vec_width)
model.get_ref("maxout_layer").set_dim("nI", tok2vec_width)
model.get_ref("norm_layer").set_dim("nI", tok2vec_width)
init_chain(model, X, Y)
return model