Can't resume interrupted training, throws AttributeError

fastai
1

I’m on colab and I’m trying to resume training that was running on fit_one_cycle using fastaiv1 but got interrupted, I used SaveModelCallback, so I passed start_epoch=3 to resume training but it throws

AttributeError: 'NBMasterBar' object has no attribute 'first_bar'

I even upgraded to the latest git versions of fastprogress and fastai and the problem presists.

2

Will work on this bug today, it’s probably linked to some changes in the last version of fastprogress.

1 Like
3

Should be fixed now.

4

Thanks! it works now.

1 Like
5

Hi!
I’m getting the same error, running in a Google Colab. Can you share the steps you took to update your setup to get past this?

Thank you!

6

!pip install fastprogress --upgrade should do the trick in a colab cell

1 Like
7

Thank you for such a quick reply @muellerzr!
Unfortunately, it doesn’t seem to update with that command, as it says:

Requirement already up-to-date: fastprogress in /usr/local/lib/python3.6/dist-packages (0.2.2)

And then the problem persists:

/usr/local/lib/python3.6/dist-packages/fastai/callback.py in on_train_begin(self, epochs, pbar, metrics)
265         self('train_begin', metrics_names=names)
266         if self.state_dict['epoch'] != 0:
--> 267             self.state_dict['pbar'].first_bar.total -= self.state_dict['epoch']
268             for cb in self.callbacks: cb.jump_to_epoch(self.state_dict['epoch'])
269 

AttributeError: 'NBMasterBar' object has no attribute 'first_bar'

Any other thoughts?

8

Install directly from git source

pip install git+https://github.com/fastai/fastai --upgrade

pip install git+https://github.com/fastai/fastprogress --upgrade
3 Likes
9

@vijayabhaskar! That did it!
Your command successfully dowloaded the version 0.2.3.
After restarting the runtime, the error has gone away.
Thanks @sgugger, also!

1 Like
10

Is it safe to execute those command from a Google cloud VM terminal as well ?
I have to same problem :

AttributeError: ‘NBMasterBar’ object has no attribute ‘first_bar’

11

I think it should be alright, it just installs the github version through pip. It may have bugs as the code is constantly changing, but should be safe.

1 Like
12

there is no more first_bar, it’s main_bar now.

I’m not sure whether @sgugger wants to provide an alias for backward compatibility.

1 Like
13

If you have trouble installing directly from git source, you can try installing by specifying the version number.

!pip install fastprogress==0.2.3
!pip install fastai==1.0.61