DeprecationWarning: attrs must be Attrs object, not dict

[brianmay]

Only the default, if nothing specified, is a dict.

Suggest the following change:

diff --git a/django_tables2/columns.py b/django_tables2/columns.py
index ed5c59d..69adc2e 100644
--- a/django_tables2/columns.py
+++ b/django_tables2/columns.py
@@ -86,7 +86,7 @@ class Column(object):
             if orderable is None:
                 orderable = sortable
         self.orderable = orderable
-        attrs = attrs or {}
+        attrs = attrs or Attrs()
         if not isinstance(attrs, Attrs):
             warnings.warn('attrs must be Attrs object, not %s'
                           % type(attrs).__name__, DeprecationWarning)

[bradleyayers]

Thanks for this, it was a bit of a silly oversight.