Jupyter Config file with post-save hook for saving Notebook as Python script

jupyter_notebook_config.py

# File path:
# ~/.jupyter/jupyter_notebook_config.py

import os
from subprocess import check_call
import datetime
import re

def timestamped_file(fname):
    return bool(re.match('.*\d{4}-\d{2}-\d{2}\.ipynb', fname))

def post_save(model, os_path, contents_manager):
    """
    Post save hooks:
        - Dumpy .py and .html and datestamped versions of notebook
    Assumed folder structure:
    ├── notebooks
        ├── src
        ├── py
        ├── html
        └── archive
    """

    if model['type'] != 'notebook':
        # Do nothing if not a notebook
        return

    d, fname = os.path.split(os_path)
    if timestamped_file(fname):
        # Do nothing for timestamped files (archived notebooks)
        return

    # Post-save hook for converting notebooks to .py scripts
    py_path = os.path.join(d, '..', 'py')
    if not os.path.exists(py_path):
        os.makedirs(py_path)
    html_path = os.path.join(d, '..', 'html')
    if not os.path.exists(html_path):
        os.makedirs(html_path)

    check_call(['jupyter', 'nbconvert', '--to', 'python', '--output-dir', py_path, '--TemplateExporter.exclude_input_prompt=True', fname], cwd=d)
    check_call(['jupyter', 'nbconvert', '--to', 'html', '--output-dir', html_path, fname], cwd=d)

    # Post-save hook for saving datestamped versions of the notebooka
    archive_path = os.path.join(d, '..', 'archive')
    if not os.path.exists(archive_path):
        os.makedirs(archive_path)
    date = datetime.datetime.now().strftime('%Y-%m-%d')
    fname_timestamped = '{}_{}.ipynb'.format(os.path.splitext(fname)[0], date)
    fpath = os.path.join(archive_path, fname_timestamped)