How to recover an unsaved or deleted Jupyter Notebook?

Step 1: Open the directory where your Jupyter Notebook was saved.

Step 2: Look for a file with the extension ".ipynb_checkpoints". This is a backup file that Jupyter automatically creates when you save your notebook.

Step 3: If you find the ".ipynb_checkpoints" file, open it. You should see a version of your notebook as it was the last time you saved it.

Step 4: If you don't see the ".ipynb_checkpoints" file, or if it doesn't contain the information you're looking for, you can try to recover the notebook from your computer's trash or recycle bin.

Step 5: If you still can't find your notebook, you may need to use a file recovery tool. There are many available online, both free and paid. These tools can often recover files that have been deleted from your computer's trash or recycle bin.

Step 6: If none of these steps work, you may need to recreate your notebook. In the future, remember to save your work frequently to prevent data loss.

Note: The ".ipynb_checkpoints" file only contains the data from the last time you saved your notebook. If you made changes to your notebook after the last save and then deleted it, those changes will not be in the ".ipynb_checkpoints" file.