title: How to get PyCharm to check PEP8 code style?
body: <p>I'm using PyCharm (v 2.7.2) to develop a Django app, but I can't get it to check PEP8 style violations.
  I have enabled "PEP8 coding style violation" in the "Inspctions" section of the settings, but PyCharm doesn't highlight the style violations.
  Is there a way to fix this?</p>