Notebook validation failed Jupyter

user_12281892 0
Viewed 12213

This is not a duplicate of Notebook Validation Failed.

I have a Jupyter ntb which was working well until recently. Whatever I do, I am getting those kind of errors which are changing (I'm attaching a few examples) and it does not matter what I do with the ntb (I tried restarting kernel, restarting Jupyter). Also, it is happening ONLY in this ntb, not in others even if run at the same time from the same session. I tried to search but could not find anything. What I get in the Jupyter is: enter image description here

There are many of those, similar but different:

The save operation succeeded, but the notebook does not appear to be valid. The validation error was:
Notebook validation failed: Non-unique cell id 'geological-poker' detected. Corrected to 'front-hampshire'.:
"<UNKNOWN>"

or others:

Notebook validation failed: Non-unique cell id 'medieval-nebraska' detected. Corrected to 'stock-eating'.:
"<UNKNOWN>"

Notebook validation failed: Non-unique cell id 'intense-award' detected. Corrected to 'blocked-garage'.:
"<UNKNOWN>"

And what I get in the terminal is:

Notebook JSON is invalid: Non-unique cell id 'medieval-nebraska' detected. Corrected to 'convinced-vacation'.

or

Notebook JSON is invalid: Non-unique cell id 'medieval-nebraska' detected. Corrected to 'described-commerce'.

Notebook JSON is invalid: Non-unique cell id 'meaning-victoria' detected. Corrected to 'occasional-numbers'.

Notebook JSON is invalid: Non-unique cell id 'eastern-buyer' detected. Corrected to 'english-benchmark'.

Any idea what's going on and how to fix it?

Update: It got fixed somehow for a while but then it started doing the same again I still do not get what it was and how it got fixed and ruined again... One fix is to make a copy of the ntb and then discard the old one.

Update 9.10.21:

It looks that this is no more a problem for python v3.8.11. I have not managed to reproduce the issue since updating all packages so probably the easiest fix now is to update. I have:

jupyter core     : 4.7.1
jupyter-notebook : 6.4.3
ipython          : 7.26.0
ipykernel        : 6.2.0
jupyter jupyter-notebook python
4 Answers
user_172881570

I have the same issue and after reading about it, it seems the cause is copy/pasting cells from other notebooks that were created in other sessions. I haven't found a way to fix it, but at least you can prevent it from happening by copying the content of the cells and not the cells themselves.

user_158161400

Simple Answer

STEP 1: Cut all the cells in the Jupyter-notebook using scissor option as shown. enter image description here

STEP 2: Save the notebook now, and paste back the cells cut in the previous step using paste option as shown. enter image description here

STEP 3: Save again and your bug should be fixed now! Hurry, Happy coding.

user_91621470

Code to resave a notebook with the cell name issue resolved:

import nbformat as nbf
from glob import glob

import uuid
def get_cell_id(id_length=8):
    return uuid.uuid4().hex[:id_length]

# -- SETUP
nb_name = 'my_notebook'

# -- MAIN
# grab notebook
notebooks = list(filter(lambda x: nb_name in x, glob("./*.ipynb", recursive=True)))

# iterate over notebooks
for ipath in sorted(notebooks):
    # load notebook
    ntbk = nbf.read(ipath, nbf.NO_CONVERT)
    
    cell_ids = []
    for cell in ntbk.cells:
        cell_ids.append(cell['id'])

    # reset cell ids if there are duplicates
    if not len(cell_ids) == len(set(cell_ids)): 
        for cell in ntbk.cells:
            cell['id'] = get_cell_id()

        nbf.write(ntbk, ipath)

Source: https://github.com/jupyter/notebook/issues/6001#issuecomment-856303981

user_51300780
Related