Does anyone have a working example of this sentence from the docs: “Package your scripts up into a true Python package. You will most likely need to use the 

COPY

 instruction to put your package into the image, and then the 

RUN

 instruction to install it.”

I just went through this myself. I have a directory of python files called

flows

that contains some custom Task subclasses. What I did was add a file called

flows/setup.py

based on this template https://github.com/pypa/sampleproject/blob/master/setup.py, and then in my dockerfile I run

COPY flows flows

and then

RUN python flows/setup.py install