Using that language we have implemented many checks from PyLint, PyFlakes etc. but for us the most interesting feature is that you can easily translate your own conventions into automated rules and check them on each commit.
So while we offer PyLint patterns as well we give you a way to go way beyond what normal linters can offer.
The way I look at it is that every minute you spend discussing a point in a review that could have been caught/corrected by a static tool is a minute wasted. But these tools can't do any of the actual work of the review.
By the way, linting is a fairly well known term with a long history, but it wouldn't surprise me if there are communities that don't know the term.
So it's pylint updated to be fully compliant with all the latest buzzword standards.
We are pretty open about our methods and technologies, check out e.g. this talk from the PyCon 2015 for more details on our approach: https://www.youtube.com/watch?v=rN0kNQLDYCI
Slides are available here: http://www.slideshare.net/japh44/talk-handout-46938511