(Path?)Problems with dockerizing a python app

[sgofferj]

Hi,

I don't know much about Python - haven't used it much yet. I'm trying to dockerize a python 2 app which doesn't seem to be maintained anymore: ham2mon, https://github.com/madengr/ham2mon
I have created a Docker file which should contain everything needed and the container builds fine:

FROM python:2-buster

RUN apt-get update -y
RUN apt-get install gnuradio-dev -y
WORKDIR /usr/src/app

COPY . .

CMD [ "python", "./ham2mon.py" ]

However, when I start it I get an error:

Error:
Traceback (most recent call last):
  File "./ham2mon.py", line 9, in <module>
    import scanner as scnr
  File "/usr/src/app/scanner.py", line 9, in <module>
    import receiver as recvr
  File "/usr/src/app/receiver.py", line 9, in <module>
    from gnuradio import gr
ImportError: No module named gnuradio

I think I know enough about Python to recognize that this is some kind of path issue because during the container build process, I can see that gnuradio 3.7.13 is installed, but I don't know how to tackle that. Any help would be greatly appreciated!

-Stefan