3.0.0 – 2016-07-25

  • Rewrite our documentation from scratch! (http://flake8.pycqa.org)
  • Drop explicit support for Pythons 2.6, 3.2, and 3.3.
  • Remove dependence on pep8/pycodestyle for file processing, plugin dispatching, and more. We now control all of this while keeping backwards compatibility.
  • --select and --ignore can now both be specified and try to find the most specific rule from each. For example, if you do --select E --ignore E123 then we will report everything that starts with E except for E123. Previously, you would have had to do --ignore E123,F,W which will also still work, but the former should be far more intuitive.
  • Add support for in-line # noqa comments to specify only the error codes to be ignored, e.g., # noqa: E123,W503
  • Add entry-point for formatters as well as a base class that new formatters can inherit from. See the documentation for more details.
  • Add detailed verbose output using the standard library logging module.
  • Enhance our usage of optparse for plugin developers by adding new parameters to the add_option that plugins use to register new options.
  • Update --install-hook to require the name of version control system hook you wish to install a Flake8.
  • Stop checking sub-directories more than once via the setuptools command
  • When passing a file on standard-in, allow the caller to specify --stdin-display-name so the output is properly formatted
  • The Git hook now uses sys.executable to format the shebang line. This allows Flake8 to install a hook script from a virtualenv that points to that virtualenv’s Flake8 as opposed to a global one (without the virtualenv being sourced).
  • Print results in a deterministic and consistent ordering when used with multiprocessing
  • When using --count, the output is no longer written to stderr.
  • AST plugins can either be functions or classes and all plugins can now register options so long as there are callable attributes named as we expect.