修复model six库引用失败

Model/models.py

@@ -1,9 +1,9 @@
 from itertools import chain
 from django.contrib.auth.models import BaseUserManager, AbstractBaseUser
 from django.db import models
-from django.utils import six
-from django.utils.encoding import python_2_unicode_compatible
-# from six import python_2_unicode_compatible
+# from django.utils import six
+# from django.utils.encoding import python_2_unicode_compatible
+from six import python_2_unicode_compatible
 from imagekit.models import ProcessedImageField
 
 from imagekit.processors import ResizeToFill