Make setup.py PEP8 compliant

setup.py

@@ -1,5 +1,14 @@
-from setuptools import setup, find_packages  # Always prefer setuptools over distutils
-from codecs import open  # To use a consistent encoding
+"""A setuptools based setup module.
+
+See:
+https://packaging.python.org/en/latest/distributing.html
+https://github.com/pypa/sampleproject
+"""
+
+# Always prefer setuptools over distutils
+from setuptools import setup, find_packages
+# To use a consistent encoding
+from codecs import open
 from os import path
 
 here = path.abspath(path.dirname(__file__))
@@ -62,16 +71,17 @@
     # simple. Or you can use find_packages().
     packages=find_packages(exclude=['contrib', 'docs', 'tests*']),
 
-    # List run-time dependencies here.  These will be installed by pip when your
-    # project is installed. For an analysis of "install_requires" vs pip's
+    # List run-time dependencies here.  These will be installed by pip when
+    # your project is installed. For an analysis of "install_requires" vs pip's
     # requirements files see:
     # https://packaging.python.org/en/latest/requirements.html
     install_requires=['peppercorn'],
 
-    # List additional groups of dependencies here (e.g. development dependencies).
-    # You can install these using the following syntax, for example:
+    # List additional groups of dependencies here (e.g. development
+    # dependencies). You can install these using the following syntax,
+    # for example:
     # $ pip install -e .[dev,test]
-    extras_require = {
+    extras_require={
         'dev': ['check-manifest'],
         'test': ['coverage'],
     },
@@ -84,8 +94,8 @@
     },
 
     # Although 'package_data' is the preferred approach, in some case you may
-    # need to place data files outside of your packages.
-    # see http://docs.python.org/3.4/distutils/setupscript.html#installing-additional-files
+    # need to place data files outside of your packages. See:
+    # http://docs.python.org/3.4/distutils/setupscript.html#installing-additional-files # noqa
     # In this case, 'data_file' will be installed into '<sys.prefix>/my_data'
     data_files=[('my_data', ['data/data_file'])],