nbstripout

#!/usr/bin/env python
"""strip outputs from an IPython Notebook
Opens a notebook, strips its output, and writes the outputless version to the original file.
Useful mainly as a git pre-commit hook for users who don't want to track output in VCS.
This does mostly the same thing as the `Clear All Output` command in the notebook UI.
Adapted from rom https://gist.github.com/minrk/6176788 to work with
git filter driver
"""
import sys, codecs

#You may need to do this for your script to work with GitX or Tower:
#sys.path.append("/Users/chris/anaconda/envs/conda/lib/python2.7/site-packages")

import nbformat as fmt

def strip_output(nb):
    """strip the outputs from a notebook object"""
    for cell in nb.cells:
        if 'outputs' in cell:
            cell['outputs'] = []
        if 'prompt_number' in cell:
            cell['prompt_number'] = None
    return nb

if __name__ == '__main__':
    nb = fmt.read(sys.stdin, fmt.NO_CONVERT)
    nb = strip_output(nb)
    if sys.version_info < (3, 0):
        sys.stdout = codecs.getwriter('utf8')(sys.stdout)
    fmt.write(nb, sys.stdout, fmt.NO_CONVERT)