Add Python 3.5 support and fix new flake8 errors

.travis.yml

@@ -20,6 +20,10 @@ before_install:
 install:
   - travis_retry python setup.py install
 
+# See https://github.com/travis-ci/travis-ci/issues/4794
+# and https://github.com/audreyr/cookiecutter/pull/540/files
+python: 3.5
+
 env:
   - TOX_ENV=flake8
   - TOX_ENV=py26
@@ -27,6 +31,7 @@ env:
   - TOX_ENV=py32
   - TOX_ENV=py33
   - TOX_ENV=py34
+  - TOX_ENV=py35
   - TOX_ENV=pypy
 
 script:

README.rst

@@ -25,6 +25,7 @@ makes sure premailer works in:
 -  Python 3.2
 -  Python 3.3
 -  Python 3.4
+-  Python 3.5
 -  PyPy
 
 Turns CSS blocks into style attributes

premailer/premailer.py

@@ -27,7 +27,7 @@ else:  # Python 2
         StringIO = StringIO  # shut up pyflakes
     from urllib2 import urlopen
     from urlparse import urljoin, urlparse
-    STR_TYPE = basestring
+    STR_TYPE = basestring  # NOQA
 
 import cssutils
 from lxml import etree
@@ -634,4 +634,4 @@ if __name__ == '__main__':  # pragma: no cover
         </body>
         </html>"""
     p = Premailer(html)
-    print (p.transform())
+    print(p.transform())

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = flake8, py26, py27, py32, py33, py34, pypy
+envlist = flake8, py26, py27, py32, py33, py34, py35, pypy
 
 [testenv]
 passenv = *