What is the best way to merge multiple Jupyter Notebooks into one?

Step 1: Open the Jupyter Notebook
Start by opening the Jupyter Notebook where you want to merge all other notebooks. This will be your main notebook.

Step 2: Import the necessary module
In a new cell, type and run the following code to import the necessary module:

import nbformat as nbf

Step 3: Define the function to merge notebooks
Next, define a function that will merge the notebooks. Here is a simple function that you can use:

def merge_notebooks(filenames):
    merged = nbf.v4.new_notebook()
    for fname in filenames:
        with open(fname) as f:
            nb = nbf.read(f, as_version=4)
            merged.cells.extend(nb.cells)
    return merged

This function takes a list of filenames as input, creates a new notebook, and then for each filename, it opens the file, reads the notebook, and extends the cells of the merged notebook with the cells of the current notebook.

Step 4: List the notebooks to be merged
Create a list of the notebooks you want to merge. Make sure to include the path to the notebook if it's not in the same directory as your main notebook. For example:

notebooks_to_merge = ["notebook1.ipynb", "notebook2.ipynb", "notebook3.ipynb"]

Step 5: Merge the notebooks
Now you can merge the notebooks by calling the function you defined earlier and passing the list of notebooks to it. For example:

merged_notebook = merge_notebooks(notebooks_to_merge)

Step 6: Save the merged notebook
Finally, you need to save the merged notebook. You can do this with the following code:

with open("merged_notebook.ipynb", "w") as f:
    nbf.write(merged_notebook, f)

This will create a new Jupyter Notebook named "merged_notebook.ipynb" which contains all the cells from the notebooks you wanted to merge.

Remember to run each cell after you've typed the code in it. After you've followed all these steps, you should have successfully merged multiple Jupyter Notebooks into one.