What's the difference between a reversed tuple and a reversed list?

Question

Reversing a tuple and reversing a list returns objects of different type:

>>> reversed((1,2))

>>> revers         


        

Answer 1

According to Python's documentation:

object.__reversed__(self)

Called (if present) by the reversed() built-in to implement reverse iteration. It should return a new iterator object that iterates over all the objects in the container in reverse order.

If the __reversed__() method is not provided, the reversed() built-in will fall back to using the sequence protocol (__len__() and __getitem__()). Objects that support the sequence protocol should only provide __reversed__() if they can provide an implementation that is more efficient than the one provided by reversed().