Modernize code for Python 3.9+

Author: Frederik Elwert

pelican/plugins/i18n_subsites/i18n_subsites.py

@@ -10,17 +10,14 @@
 import os
 import posixpath
 
-import six
-
 try:
     from collections.abc import OrderedDict
 except ImportError:
     from collections import OrderedDict
 from contextlib import contextmanager
 import gettext
 import locale
-
-from six.moves.urllib.parse import urlparse
+from urllib.parse import urlparse
 
 from pelican import signals
 from pelican.generators import ArticlesGenerator, PagesGenerator
@@ -405,7 +402,7 @@ def update_generators():
 def get_pelican_cls(settings):
     """Get the Pelican class requested in settings."""
     cls = settings["PELICAN_CLASS"]
-    if isinstance(cls, six.string_types):
+    if isinstance(cls, str):
         module, cls_name = cls.rsplit(".", 1)
         module = __import__(module)
         cls = getattr(module, cls_name)