Most code were copied from https://jupyter-notebook.readthedocs.io/en/stable/examples/Notebook/Importing%20Notebooks.html
from jupyter_utils_tddschn import notebook_importer
# then just import a .ipynb file like a .py file
# to import test.ipynb:
import test
from jupyter_utils_tddschn.notebook_shower import show_notebook
show_notebook('notebooks/test.ipynb')