I worked through the notebook for lesson 2 using google cloud.
After installing fastai, fastbook and ipywidgets all cells executed without error.
To my surprise when I tried to execute the first cell from the lesson 2 clean notebook it gives me the error message: “NameError: ‘CallbackHandler’ is not defined”
This is despite the exact same content:
import fastbook
fastbook.setup_book()
executes perfect in the lesson notebook.
unfortunately updating fastai does not help. After uninstalling it each time I tried the latest and 4 previous versions. Always the same error message.
I also tried with different versions of fastbook. Always the same error message.
In PyPI I found that new versions for the fastai, fastcore and fastbook packages were created in the last days.
I assume the error is due to me using the latest versions of all 3.
Can somebody please advise which versions of:
fastai
fastcore
fastbook
work together without error message on import??