質問編集履歴
4
添付コードの不具合の修正
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def __len__(self):
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3
記載したコードの抜けを追記しました
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class VGG(Chain):
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def __init__(self):
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super(VGG, self).__init__()
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with self.init_scope():
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self.base = L.VGG16Layers()
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self.classify = L.Linear(None, 20)
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def __call__(self, x):
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h = self.base(x, layers=['fc7'])['fc7']
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return self.classify(h)
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class DataSet(dataset.DatasetMixin):
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def __init__(self):
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def __len__(self):
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return 2
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2
エラーが出る具体的なコードを記載しました
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test
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##
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## エラーが再現できたコード
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以下のコードで同様のエラーが発生しました。
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```python
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import numpy as np
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import chainer.links as L
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import chainer.functions as F
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from chainer import dataset, Chain, training, optimizers, \
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iterators, reporter, cuda,serializers
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import argparse
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if cuda.available:
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xp = cuda.cupy
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else:
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xp = np
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class DataSet(dataset.DatasetMixin):
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def __init__(self):
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pass
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def __len__(self):
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return 10
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def get_example(self, _):
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return xp.ones((3, 224, 224)).astype('float32'), xp.zeros((1,)).astype('int32')[0]
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('--epoch', '-e', type=int, default=2,
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help='Number of examples in epoch')
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parser.add_argument('--batchsize', '-b', type=int, default=1,
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help='Number of examples in each mini-batch')
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parser.add_argument('--gpu', '-g', type=int, default=-1,
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help='GPU ID (negative value indicates CPU)')
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parser.add_argument('--out', '-o', default='result2',
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help='Directory to output the result')
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parser.add_argument('--resume', '-r', default='',
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help='Resume the training from snapshot')
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args = parser.parse_args()
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train_dataset = DataSet()
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model = L.Classifier(VGG())
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if args.gpu >= 0:
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cuda.get_device_from_id(args.gpu).use()
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model.to_gpu()
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optimizer = optimizers.Adam()
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optimizer.setup(model)
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model.predictor.base.disable_update()
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train_iter = iterators.SerialIterator(
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train_dataset, batch_size=args.batchsize)
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updater = training.StandardUpdater(train_iter, optimizer)
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trainer = training.Trainer(
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updater, (args.epoch, 'epoch'), out=args.out)
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trainer.extend(training.extensions.LogReport(
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trigger=(1, 'epoch')))
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trainer.extend(training.extensions.PrintReport(
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entries=['iteration', 'main/loss',
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'main/accuracy', 'elapsed_time']),
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trigger=(1, 'epoch'))
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# ここでsnapshotを取っています。
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trainer.extend(training.extensions.snapshot(),
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trainer.extend(training.extensions.snapshot(),
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trigger=(
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trigger=(1, 'epoch'))
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if args.resume:
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if args.resume:
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-
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# ここで読み込んでいます
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-
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serializers.load_npz(args.resume, trainer)
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-
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trainer.run()
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if __name__ == "__main__":
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main()
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-
```
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```
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241
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以下のように実行すると上記のエラーが生じました。
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244
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+
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245
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```
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python test.py --gpu 0
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python test.py --gpu 0 --resume ./result2/snapshot_iter_1
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```
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1
追記の依頼があったらため、エラーの原因と考えられるコードを加筆しました。
test
CHANGED
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File without changes
|
test
CHANGED
|
@@ -77,3 +77,21 @@
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77
77
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78
78
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79
79
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このエラーの対策をご存知の方がいらっしゃれば、ご教授お願いします。
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81
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82
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83
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## 追記
|
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84
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+
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85
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+
snapshotの書き出しと、読み込みは以下のコードで行なっています。
|
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86
|
+
|
|
87
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+
```python
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88
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+
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89
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+
trainer.extend(training.extensions.snapshot(),
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+
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trigger=((1, 'epoch')))
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if args.resume:
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chainer.serializers.load_npz(args.resume, trainer)
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+
````
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