Note: This class doesn't actually work on 3.4 in other ways (because __getitem__ is not idempotent, while OrderedDict assumes it is):

>>> s = SimpleLRUCache(2)
>>> s['t1'] = 1
>>> s
SimpleLRUCache([('t1', 1)])
>>> s['t2'] = 2
>>> s
SimpleLRUCache([('t1', 1)])
>>> s
SimpleLRUCache([('t2', 2)])  # <-- No changes, repr different

If your __getitem__ isn't idempotent, you've broken a basic assumption built into the logic of the other methods you inherited, and you're going to need to override other methods to avoid misbehavior.