Dhruv Manilawala 2520ebb145 Fallback to kernelspec to check if it's a Python notebook (#12875) ... ## Summary This PR adds a fallback logic for `is_python_notebook` to check the `kernelspec.language` field. Reference implementation in VS Code: 1c31e75898/extensions/ipynb/src/deserializers.ts (L20-L22) It's also required for the kernel to provide the `language` they're implementing based on https://jupyter-client.readthedocs.io/en/stable/kernels.html#kernel-specs reference although that's for the `kernel.json` file but is also included in the notebook metadata. Closes: #12281 ## Test Plan Add a test case for `is_python_notebook` and include the test notebook for round trip validation. The test notebook contains two cells, one is JavaScript (denoted via the `vscode.languageId` metadata) and the other is Python (no metadata). The notebook metadata only contains `kernelspec` and the `language_info` is absent. I also verified that this is a valid notebook by opening it in Jupyter Lab, VS Code and using `nbformat` validator.		2024-08-14 12:36:09 +05:30
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jupyter	Fallback to kernelspec to check if it's a Python notebook (#12875)	2024-08-14 12:36:09 +05:30