This is the script that I used to convert the Jupyter notebooks in the QuantLib Python Cookbook into the Leanpub-flavored Markdown files required for publication with Leanpub.
The script must be passed the name of the notebook to convert and the name of the output directory (which must already exist); for instance, running
python ipynb2lmd.py example.ipynb output/
in this folder will create example.md in the output directory,
along with a pair of figures (also extracted from the notebook) that
the notebook contains and the Markdown file includes.
This script is released under the 3-Clause BSD license; see LICENSE for details.
I hope you'll find this script useful, but I won't provide support for it. You're welcome to fork it and improve it.