convert.py

from subprocess import call
from sys import argv

def convert(fname):
    """
    Convert ipython notebook from nbformat=4 to 3
    jupyter-nbconvert --to=notebook --nbformat=3 xxx --output=yyy
    """
    ofname = fname.replace('.v4','.v3')
    call(['jupyter-nbconvert', '--to=notebook', '--nbformat=3', fname, '--output=%s'%ofname])

files = (
    'basics/basics.v4.ipynb',
    'galactic_backtracking/galactic_backtracking.v4.ipynb',
    'galactic_lensing/lensing_cr.v4.ipynb',
    'galactic_lensing/lensing_maps.v4.ipynb',
    'galactic_trajectories/galactic_trajectories.v4.ipynb',
    'secondaries/neutrinos.v4.ipynb',
    'secondaries/photons.v4.ipynb',
    'sim1D/sim1D.v4.ipynb',
    'trajectories/trajectories.v4.ipynb'
    )

if len(argv) == 1:
    # convert all listed notebooks from v4 to v3
    for f in files:
        convert(f)
else:
    # convert specific notebooks
    for f in argv[1:]:
        convert(f)