Error message on jupyter notebook
Closed this issue · 1 comments
Hi...I saved and restarted the kernel as the update comment suggested, then I tried to validate the homework running "validate", I'm getting this error message, and I found this resource (jupyter/nbgrader#883), but I'm not sure if I have the ability to fix the problem on my side:
There was an error running the validate command:
Traceback (most recent call last):
File "/opt/applications/python/3.6.3/gnu/lib/python3.6/site-packages/nbgrader/server_extensions/validate_assignment/handlers.py", line 46, in validate_notebook
result = validator.validate(fullpath)
File "/opt/applications/python/3.6.3/gnu/lib/python3.6/site-packages/nbgrader/validator.py", line 311, in validate
nb = self._preprocess(nb)
File "/opt/applications/python/3.6.3/gnu/lib/python3.6/site-packages/nbgrader/validator.py", line 290, in _preprocess
nb, resources = pp.preprocess(nb, resources)
File "/opt/applications/python/3.6.3/gnu/lib/python3.6/site-packages/nbgrader/preprocessors/checkcellmetadata.py", line 16, in preprocess
raise ValidationError(msg)
jsonschema.exceptions.ValidationError: Notebook failed to validate; the nbgrader metadata may be corrupted.
It seems an issue that it is related to the cells which were generated by the owner of the homework, if these cell manipulated in someway, the error will popup, @nicolemadrazo pointed out that she experienced this before. I do rearrange cells all the time to organize my thought when approaching a question, but I also did copy testthat cell and did paste it closer to the end of the homework to make it easy to run after connecting to VPN and restarting the kernel.