* session.order[id]=session.clear()* * * I would think the above would generate an error -- session.clear() empties the session object (and returns None), and then you attempt to assign to session.order[id], even though session.order no longer exists. Assuming session.order is a list, session.order.clear() would also generate an error, as .clear() is not a method of lists. As Derek suggested, you can use del to remove an item from a list.
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