How to write libreoffice python macros in venv?

[Jim]

I have all the necessary libreoffice modules installed in my Mint 18.1 
system to allow me to write libreoffice calc macros in python.

I now have venv installed. If I try to import uno for a calc macro in it 
I get an error that there is no uno module.

How can I get my venv to find uno and the other necessary modules so I 
can write calc macros in it?

Thanks,  Jim