Python 2.7 - Mutation Testing Tool suggestions

I have a system, whose modules are written in Python 2.7 and I'm given the task of proceeding with a mutation testing of some of the modules. I've done my research on the topic and now I'm getting on the tools. As long as I read, MutPy is considered to be the best (so far) developed tool for this kind of testing. The problem is, though, it is suitable for testing in Python 3.* versions.

Could somebody please help me with ideas for other tools for Python 2.7?

I was also thinking of converting the modules I need from 2.7 to 3.*, but I'm unsure if the system will somehow misbehave.

Any help will be appreciated, thank you.