What are the different methods available for deque in Python?

What are the different methods available for deque in Python?

In Python, the deque class from the collections module provides several methods. Some of the key methods include append(), appendleft(), pop(), popleft(), extend(), and extendleft(). Would you like to know more about any specific method?

Can you explain how append() and appendleft() work?

Sure! The append() method adds an element to the right end of the deque, while appendleft() adds an element to the left end. For example, if you have a deque d = deque([1, 2, 3]), calling d.append(4) will result in deque([1, 2, 3, 4]), and d.appendleft(0) will result in deque([0, 1, 2, 3]).

What about pop() and popleft()?

The pop() method removes and returns an element from the right end of the deque, while popleft() removes and returns an element from the left end. Using the previous example, calling d.pop() would return 4 and modify d to deque([0, 1, 2, 3]), while d.popleft() would return 0 and modify d to `deque([1, 2, 3]).

Are there any performance benefits of using deque over a list?

Yes, deques are optimized for fast fixed-time appends and pops from both ends, while lists can be slower for these operations, especially when modifying the front of the list.