I made a module to offer some more options for some of these problems recently - particularly useful when you have code that you _want_ to keep organized in a notebook for continued interactive experimentation and/or for explaining a prototype process — but you also want to reuse that code in an external script or program. Let’s you call any notebook as a function. Keyword arguments can be passed and there’s a simple way to receive these values within the notebook to allow the notebook to be parametrizable when invoked externally.
https://github.com/breathe/NotebookScripter