Convert iPython Notebook (.ipynb) to a Python file (.py) from CLI

convert_ipynb_to_py.py

"""Convert ipynb file to py file from CLI.

Usage:
    python ./convert_ipynb_to_py.py [full input path] [full output path]

!! overwrites output path without warning if it exists !!
"""
import sys
import json


with open(sys.argv[1], "r") as f:  # input.ipynb
    j = json.load(f)
with open(sys.argv[2], "w") as of:  # output.py
    cells = j["cells"] if j["nbformat"] >= 4 else j["worksheets"][0]["cells"]
    for i, cell in enumerate(cells):
        of.write("\n# cell " + str(i) + "\n")
        for line in cell["source"]:
            of.write(line)
        of.write("\n\n")

Thanks for this.