, or simply deque , is an uncommon type of collection. If we search around the internet, we will find a lot of information about lists, dictionaries, and tuples, but little on deque. Deque (you can also pronounce it “ deck” ) is an interesting and useful type of collection in Python. What makes it different than other objects is that it will hold only the number of items that you want or fewer, never more. A double-ended queue will hold just up to the number of items that you determine. Never more. What the Heck is a Deck? So it works just as a deck using the FIFO system ( First In, First Out) . Once the deck is full, if you append another item, it will drop the first element on the left and add the new one to the right. Let’s see some basic examples to understand this collection. First, import it from collections: from collections import deque .  Creating a deque Next, we will create a simple deck and add a maximum length of 3 items to it.…