name 'ModelDataLoader' is not defined

[bitdata]

env: Ubuntu 16.04 x64, Python 3.6.6, Pytorch 0.2.0, web.py 0.40.dev0

NameError Traceback (most recent call last)
in ()
3 aug_tfms = [RandomRotate(20), RandomLighting(0.8, 0.8)]
4 tfms = tfms_from_model(arch, sz, aug_tfms=aug_tfms, max_zoom=1.2)
----> 5 data = ImageClassifierData.from_paths(path, tfms=tfms, test_name='test', bs=bs)
6
7 ims = np.stack([get_augs() for i in range(6)])

in from_paths(cls, path, bs, tfms, trn_name, val_name, test_name, num_workers)
60 test_fnames = read_dir(path, test_name) if test_name else None
61 datasets = cls.get_ds(FilesIndexArrayDataset, trn, val, tfms, path=path, test=test_fnames)
---> 62 return cls(path, datasets, bs, num_workers, classes=trn[2])
63
64 @classmethod

in init(self, path, datasets, bs, num_workers, classes)
6 self.get_dl(ds,shuf) for ds,shuf in [
7 (trn_ds,True),(val_ds,False),(fix_ds,False),(aug_ds,True),
----> 8 (test_ds,False),(test_aug_ds,False)
9 ]
10 ]

in (.0)
4 self.path,self.bs,self.num_workers,self.classes = path,bs,num_workers,classes
5 self.trn_dl,self.val_dl,self.fix_dl,self.aug_dl,self.test_dl,self.test_aug_dl = [
----> 6 self.get_dl(ds,shuf) for ds,shuf in [
7 (trn_ds,True),(val_ds,False),(fix_ds,False),(aug_ds,True),
8 (test_ds,False),(test_aug_ds,False)

in get_dl(self, ds, shuffle)
13 def get_dl(self, ds, shuffle):
14 if ds is None: return None
---> 15 return ModelDataLoader.create_dl(ds, batch_size=self.bs, shuffle=shuffle,
16 num_workers=self.num_workers, pin_memory=False)
17

NameError: name 'ModelDataLoader' is not defined

[bygreencn]

Check you notebook kenerl crashed since of memory or timeout. It is not the issue of the code.