Fundamental problem with an import of the additional packages in the docker container/Container cant import from the folder in the folder

Hello.Unfortunatelly, I did wrong conclusions about the sources of my problems.

Problems are associated with the impossibility of the import of the .cpp file and impossibility of the import of the packages directly from the lib/python3.6 .

I created 2 more topics, because name of this topic does not matches with the discussed problem anymore.