python - Django insert into list if doesn't contain it -


i want insert notifications list, 1 notification of each type. , have this:

result initial query (i guess list queryset), named notifications:

[<notification: should first>, <notification: new link>]

and restriction have is:

   for(note in notification):         if len(note.region.all()) == 0 , (note.notificationtype.priority not in notifications):         notifications.append(note)

my question is, how inside notifications list attribute notificationtype.priority see number isn't inside notifications list.

if question, can try : 

notificationspiorities = set([note.notificationtype.priority note in notifications ])    for(note in notification):         if len(note.region.all()) == 0 , (note.notificationtype.priority not in notificationspiorities ):         notifications.append(note)         notificationspiorities.add(note.notificationtype.priority)

also, may need rename variables. can't tell sure notification , notifications. 1 list display, , 1 list retrieve query ?


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