fix importing six on django < 2

Author: crucialfelix

ajax_select/fields.py

@@ -2,7 +2,8 @@
 
 import json
 import sys
-from six import text_type
+
+from ajax_select.registry import registry
 from django import forms
 from django.conf import settings
 from django.contrib.contenttypes.models import ContentType
@@ -14,7 +15,11 @@
 from django.utils.module_loading import import_string
 from django.utils.safestring import mark_safe
 
-from ajax_select.registry import registry
+try:
+    from six import text_type
+except ImportError:
+    from django.utils.six import text_type
+
 
 if sys.version_info.major >= 3:
     from django.utils.translation import gettext as _

example/example/lookups.py

@@ -1,12 +1,16 @@
 from __future__ import unicode_literals
 
+import ajax_select
+from ajax_select import LookupChannel
 from django.db.models import Q
 from django.utils.html import escape
-from django.utils.six import text_type
+
 from example.models import Group, Person, Song
 
-import ajax_select
-from ajax_select import LookupChannel
+try:
+    from six import text_type
+except ImportError:
+    from django.utils.six import text_type
 
 
 class PersonLookup(LookupChannel):