databunch API seems to be broken.

[at110]

Hi Renato,

I updated my fastai repository and looking like it broke fastai_scans.
for

data = (fastai_scans.SegmentationItemList.from_paths(train_data_bolz, train_labels_bolz)
                                         .random_split_by_pct(0.2, seed=7)
                                         .label_from_bcolz()
                                         .transform(fastai_scans.get_transforms(), tfm_y=True)
                                         .databunch(bs=bs)
                                         .normalize())

I am getting

TypeError Traceback (most recent call last)
in
3 .label_from_bcolz()
4 .transform(fastai_scans.get_transforms(), tfm_y=True)
----> 5 .databunch(bs=bs)
6 .normalize())

~/fastai-fork/fastai/data_block.py in databunch(self, path, bs, val_bs, num_workers, dl_tfms, device, collate_fn, no_check, **kwargs)
494 path = Path(ifnone(path, self.path))
495 data = self.x._bunch.create(self.train, self.valid, test_ds=self.test, path=path, bs=bs, val_bs=val_bs,
--> 496 num_workers=num_workers, device=device, collate_fn=collate_fn, no_check=no_check, **kwargs)
497 if getattr(self, 'normalize', False):#In case a normalization was serialized
498 norm = self.normalize

~/tutorials/fastai_scans/fastai_scans/data.py in create(cls, train_ds, valid_ds, **kwargs)
25 @classmethod
26 def create(cls, train_ds, valid_ds, **kwargs):
---> 27 return super().create(train_ds, valid_ds, **kwargs)
28
29 def normalize(self, format3d=True, do_x=True, do_y=False):

TypeError: create() got multiple values for keyword argument 'num_workers'

[at110]

it was simple change...

class BcolzDataBunch(DataBunch):
    @classmethod
    def create(cls, train_ds, valid_ds, **kwargs):
        return super().create(train_ds, valid_ds,  num_workers=0, **kwargs)

to

class BcolzDataBunch(DataBunch):
    @classmethod
    def create(cls, train_ds, valid_ds, **kwargs):
        return super().create(train_ds, valid_ds,  **kwargs)

Solved issue

[renato145]

It should be working now :)

[at110]

Thanks @renato145