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27c7158166
Summary: There is a module called `2to3` which you can target for future specifically to remove these, the directory of `caffe2` has the most redundant imports: ```2to3 -f future -w caffe2``` Pull Request resolved: https://github.com/pytorch/pytorch/pull/45033 Reviewed By: seemethere Differential Revision: D23808648 Pulled By: bugra fbshipit-source-id: 38971900f0fe43ab44a9168e57f2307580d36a38
80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
## @package batch_mse_loss
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# Module caffe2.python.layers.batch_mse_loss
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from caffe2.python import core, schema
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from caffe2.python.layers.layers import (
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ModelLayer,
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)
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from caffe2.python.layers.tags import (
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Tags
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)
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import numpy as np
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class BatchMSELoss(ModelLayer):
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def __init__(self, model, input_record, name='batch_mse_loss', **kwargs):
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super(BatchMSELoss, self).__init__(model, name, input_record, **kwargs)
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assert schema.is_schema_subset(
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schema.Struct(
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('label', schema.Scalar()),
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('prediction', schema.Scalar())
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),
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input_record
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)
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self.tags.update([Tags.EXCLUDE_FROM_PREDICTION])
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self.output_schema = schema.Scalar(
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np.float32,
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self.get_next_blob_reference('output'))
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def add_ops(self, net):
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prediction = self.input_record.prediction()
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label = self.input_record.label.field_blobs()
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if self.input_record.label.field_type().base != (
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self.input_record.prediction.field_type().base):
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label = net.Cast(
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label,
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net.NextScopedBlob('cast_label'),
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to=schema.data_type_for_dtype(
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self.input_record.prediction.field_type()
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)
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)
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label = net.ExpandDims(label, 1, dims=[1])
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label = net.StopGradient(
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label,
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net.NextScopedBlob('stopped_label')
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)
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l2dist = net.SquaredL2Distance(
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[label, prediction],
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net.NextScopedBlob('l2')
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)
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if 'weight' in self.input_record.fields:
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weight_blob = self.input_record.weight()
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if self.input_record.weight.field_type().base != np.float32:
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weight_blob = net.Cast(
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weight_blob,
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weight_blob + '_float32',
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to=core.DataType.FLOAT
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)
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weight_blob = net.StopGradient(
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[weight_blob],
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[net.NextScopedBlob('weight_stop_gradient')],
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)
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l2dist = net.Mul(
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[l2dist, weight_blob],
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net.NextScopedBlob('weighted_l2_distance'),
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)
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net.AveragedLoss(l2dist, self.output_schema.field_blobs())
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