python equivalent to heckle

[rustom]

heckle in ruby is inspired by jester for java. I quote:

Heckle is a mutation tester. It modifies your code and runs your tests
to make sure they fail. The idea is that if code can be changed and
your tests don't notice, either that code isn't being covered or it
doesn't do anything.
from http://glu.ttono.us/articles/2006/12/19/tormenting-your-tests-with-heckle

Is there anything similar for python??