dict_func quick fix

Author: znick

anytask/courses/templatetags/dict_func.py

@@ -20,4 +20,4 @@ def get_url(d, key):
 
 @register.filter(name='get_group_name')
 def get_group_name(d):
-    return d.keys()[0].name
+    return list(d.keys())[0].name