How to locate and install python modules ?

Hello all,
I am using the BBB in the simplest connection method, Host PC USB → BBB. I also connected to the modem/router via BBB Ethernet and I can ping and apt-get works as well.
I have a test python script copied from the host PC that requires a python module (python-virtkey). I was using synaptic on the host to install python modules and no problem there.
Is there a method that I can use with the current connection to be able to install the python modules ?