The Python Game Book

python command / module, see:

• https://docs.python.org/3.8/library/collections.html#collections.deque

Faster, more effecient lists (containers, iteratbles) that support more methods, like appending to left, extending to left, pop from both sides and rotation

Deprecated since version 3.3, will be removed in version 3.10: Moved Collections Abstract Base Classes to the collections.abc module. For backwards compatibility, they continue to be visible in this module through Python 3.9.