import json
import os

#Define path of Jupyter notebook File:
notebook_path = r"c:\Users\Pat\Test.ipynb"

#Read in notebook as JSON and delete all output cells:
with open(notebook_path, "r") as f:
    nb = json.load(f)
    for i, cell in enumerate(nb["cells"]):
        if "outputs" in nb["cells"][i]:
            nb["cells"][i]["outputs"] = []

#Write new jupyter notebook file without output cells
output_path = os.path.join(os.path.splitext(notebook_path)[0] \
                           + "_no_output.ipynb")
with open(output_path, "w") as f:
    json.dump(nb, f, indent=4)