I've created multiple python modules as .py files in a Python IDE called Pyzo in the following path:
'C:\Users\Michael\Anaconda3\Lib\site-packages'
which I can then import like regular Python packages such as pandas and numpy into my Jupyter notebook or into Pyzo.
I'm a bit lost as to how to create a module in Jupyter notebook, containing a class with say a simple function, which I can then save and import into a new Jupyter notebook file.
The examples in this link below I found extremely vague and overly complicated. Any simpler examples would help, thanks! http://nbviewer.jupyter.org/github/ipython/ipython/blob/master/examples/IPython%20Kernel/Importing%20Notebooks.ipynb
The easiest way to import user created modules on JupyterLab is to Export Notebook as an executable script from File menu as in screenshot. This will download .py file to your pc or mac. Just drag that downloaded file to your jupyterlab to import.
download notebook as .py file
Now you can upload in the same .ipynb directory, and use that module in other notebooks.