Learn.lr_find() returns AttributeError: 'NoneType' object has no attribute 'update'

fastai
1

Hello, I am a quite new comer in fastai; when using learn.lr_find(); it reports:
File “/home/zenglinlin/.local/lib/python3.8/site-packages/fastprogress/fastprogress.py”, line 168, in show self.out.update(HTML(self.html_code))
AttributeError: ‘NoneType’ object has no attribute 'update’
This is the code:

image
image1087×465 37.4 KB

This is attribute error:
Image 009
Image 0091060×835 69.5 KB

Image 008
Image 0081054×283 17.5 KB

Depency package:
fastai==2.5.3
fastbook== 0.0.18
torch==1.10.0+cu113
torchvision==0.11.1+cu113
I have checked, src.show_batch() can be run success and return images; and the version of fastai is the newest one as well.

2

IPython==7.3.10 is the newest version;
I also checked whether it is due to bar display problems

image
image747×396 60.1 KB

now I am not sure where problem rooted in;
Is it due to I am using .py instead of jupyter? I have tried jupyter with the same code; it reports like " Cuda out of memory due to cannot do multiprocess" l