Using collections deque for queues and stacks in python

in python, the `deque` (double-ended queue) data structure from the `collections` module can be used to implement both queues and stacks efficiently. a deque is a generalized form of a queue that allows elements to be added or removed from both ends.

to use a `deque` as a queue, you can append elements to one end and pop elements from the other end. to use a `deque` as a stack, you can append and pop elements from the same end.

here is a step-by-step guide on using `deque` for queues and stacks in python, along with code examples:

1. import the `deque` class from the `collections` module:

2. initialize a `deque` object to use it as a queue:

3. add elements to the queue using the `append()` method:

4. remove elements from the queue using the `popleft()` method:

5. initialize a `deque` object to use it as a stack:

6. add elements to the stack using the `append()` method:

7. remove elements from the stack using the `pop()` method:

by following these steps, you can efficiently implement both queues and stacks using `deque` in python. remember that `deque` provides o(1) time complexity for adding or removing elements from both ends, making it a good choice for implementing queues and stacks.

here is a full example combining both queue and stack operations using `deque`:

this code snippet demonstrates how to use `deque` as both a queue (fifo - first in first out) and a stack (lifo - last in first out) in python.

...

#python collections module
#python collections tutorial
#python collections defaultdict
#python collections iterable

python collections module
python collections tutorial
python collections defaultdict
python collections iterable
python collections counter example
python collections
python collections cheat sheet
python collections w3schools
python deque peek
python deque popleft
python deque vs list
python deque empty
python deque implementation
python deque to list
python deque maxlen
python deque