Not able to run dawn_mod.py

[awan-10]

Hi Folks, thank you for doing this great work at fastai.

I am trying to reproduce the following

python dawn_mod.py ~/data/cifar10/ --save-dir ~/data/cf_train_save/wrn_v5 -a wrn_22 --fp16 --loss-scale 512 --epochs 1 --cycle-len 30 --lr 1.5 --wd 1e-4 --use-clr 20,20,0.95,0.85

and I am getting this error:

Traceback (most recent call last):
  File "dawn_mod.py", line 343, in <module>
    main()
  File "dawn_mod.py", line 329, in main
    **sargs)
  File "/home/ammar/.local/lib/python3.6/site-packages/fastai/learner.py", line 287, in fit
    return self.fit_gen(self.model, self.data, layer_opt, n_cycle, **kwargs)
  File "/home/ammar/.local/lib/python3.6/site-packages/fastai/learner.py", line 234, in fit_gen
    swa_eval_freq=swa_eval_freq, **kwargs)
  File "/home/ammar/.local/lib/python3.6/site-packages/fastai/model.py", line 112, in fit
    model_stepper = stepper(model, opt.opt if hasattr(opt,'opt') else opt, crit, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'sampler'

Any ideas? Has the API for fastai changed? I used pip install for all the dependencies and fastai itself.

[mklissa]

I get the same error.

[bearpelican]

Yup looks like you need to set trn_sampler at the ModelData level now.

Inside torch_loader function:
if train_sampler is not None: data.trn_sampler = train_sampler

[MaveriQ]

I am getting the same error with fastai_imagenet.py. Should I open another issue?

[mklissa]

To me it seems as though extra arguments are passed to the stepper through **kwargs - arguments that it is not supposed to receive.

[jiaweizzhao]

I got the same error with fastai_imagenet.py too. Did anyone solve this problem yet?

[brettkoonce]

Use the fastai git checkout mentioned in the readme (e.g do a git reset --hard SHA1) and then the rest should work.

[garyhujingyao]

@brettkoonce
Hi,

I did git reset --hard SHA1, but I got this error.

fatal: ambiguous argument 'SHA1': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git [...] -- [...]'

I tried this command both in fastai/ git directory and imagenet-fast directory.

Can you link the readme file you are referring to?

[nebfield]

@brettkoonce
Hi,

I did git reset --hard SHA1, but I got this error.

fatal: ambiguous argument 'SHA1': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git [...] -- [...]'

I tried this command both in fastai/ git directory and imagenet-fast directory.

Can you link the readme file you are referring to?

Run git reset -hard f9c3d22cdb79e9438c308e3baeb91f04944081fe in the fastai/ directory. Then run the scripts you need to in the imagenet-fast/ directory.

Here is the README Brett mentioned.

[brettkoonce]

@nebfield Thanks!