They can take a little while to get set up exactly how you like them, but once you do, run them on your CI server after every commit and it'll output the warnings about style violations and so on. That's basically what you're after. It's not a replacement for a manual code review but it's certainly closer to what you want than nothing!
As other have said though, this only works if you and your team treat code quality as important and actually take the time to understand the output of the analysis tools. That's why I like the CI approach, so that you can see if the number of warnings is going up or down over time and react accordingly. That metric is a useful one to keep an eye on to get a view on the quality of your code, and if it gets too high you can schedule some time.
(PS if you are interested in learning more about "Automatic Code Reviews" for Python, here's a talk I did at EuroPython14: http://carlcrowder.com/pages/europython-2014-automatic-code-... )