PythonistaLab 1.0 (8): Notebook validation errors

[RichardPotthoff]

I used this Python script to check if the '.ipynb' files are valid notebooks:

import nbformat
import os
import glob
print(f'| {nbformat.version_info=} |')
print(f'| :--: |\n')
print(f'| Filename | Errors |')
print(f'| :- | :- |')
for filename in glob.glob("*.ipynb"):
  try:
    validation_errors={}
    nbformat.read(filename,as_version=nbformat.NO_CONVERT,capture_validation_error=validation_errors)
    print(f'| {filename} | {validation_errors} |')
  except Exception as e:
    print(f'| {filename} | {e} |')

Here are the results for the files in the Pythonista Lab folder:

nbformat.version_info=(5, 10, 4)

Filename	Errors
Test_Imports.ipynb	{'ValidationError': <NotebookValidationError: "'execution_count' is a required property">}
Magic Cells.ipynb	{}
Validate_Notebooks.ipynb	{}
Welcome.ipynb	The notebook is invalid and is missing an expected key: 'str' object has no attribute 'items'
Classic Examples.ipynb	The notebook is invalid and is missing an expected key: 'str' object has no attribute 'items'
EmptyPythonistaNotebook.ipynb	{}
Mandelbrot Fractals.ipynb	The notebook is invalid and is missing an expected key: 'str' object has no attribute 'items'
User Interfaces.ipynb	{'ValidationError': <NotebookValidationError: "'execution_count' is a required property">}
Shortcuts.ipynb	The notebook is invalid and is missing an expected key: 'str' object has no attribute 'items'

The files are still readable, but preview converters may have problems generating a preview. Here is an example on GitHub:
Test_Imports.ipynb