deque is not a subclass of Sequence.

[Mark Lawrence]

On 07/04/2016 10:25, Antoon Pardon wrote:
>
> the index() method seems to be added in 3.5, so is deque
> a subclass of Sequence in 3.5?
>

Yes, this http://bugs.python.org/issue23704 refers.

Use the builtin 
https://docs.python.org/3/library/functions.html#issubclass to try it.

 >>> issubclass(deque, Sequence)
True

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence