Need to import a framework developed in Python 2.7 into TestComplete

We have 2 different test suites one for front end and one for backend testing needs. The front end suite was developed in VB on TestComplete while the backend test suite was developed on Python 2 outside TestComplete. We are looking to have a unified shared Python based development down the lane where we can share the libraries between UI and backend development. 

 

The problem here is that this python test suite was developed on Python 2 and is currently supported on Python 2.7 rather than the TestComplete supported Python 3.6. 

 

Any suggestions on how can I do that while still maintaning support for the ongoing Python 2 devlopment from other teams and our team developing further UI test/backend scenarios in Python on TestComplete.