Fix import on Python 3

This changes fixes the import for cStringIO and ifilterfalse as intended
by pull request #60. In this old pull request the import for
ifilterfalse is tried in the wrong direction for Python 2 and 3.

Author: tobiasge

rtkit/__init__.py

@@ -1,5 +1,5 @@
 __author__ = 'Andrea De Marco <24erre@gmail.com>'
-__version__ = '0.7.2'
+__version__ = '0.7.3'
 __classifiers__ = [
     'Development Status :: 4 - Beta',
     'Intended Audience :: Developers',
@@ -11,7 +11,7 @@
     'Topic :: Internet :: WWW/HTTP',
     'Topic :: Software Development :: Libraries',
 ]
-__copyright__ = "2011 - 2017, %s " % __author__
+__copyright__ = "2011 - 2019, %s " % __author__
 __license__ = """
    Copyright (C) %s
 

rtkit/parser.py

@@ -1,9 +1,11 @@
 try:
-    from itertools import filterfalse as ifilterfalse
     from cStringIO import StringIO
 except ImportError:
-    from itertools import ifilterfalse
     from io import StringIO
+try:
+    from itertools import ifilterfalse
+except ImportError:
+    from itertools import filterfalse as ifilterfalse
 import re
 from rtkit import comment