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2. python - queue.Queue vs. collections.deque - Stack Overflow

   stackoverflow.com/questions/717148

   If you look at the source of Queue.Queue, it uses deque under the hood. collections.deque is a collection, while Queue.Queue is a communications mechanism. The overhead in Queue.Queue is to make it threadsafe. Using deque for communicating between threads will only lead to painful races.

3. python: deque vs list performance comparison - Stack Overflow

   stackoverflow.com/questions/23487307

   In python docs I can see that deque is a special collection highly optimized for poping/adding items from left or right sides. E.g. documentation says: Deques are a generalization of stacks and queues (the name is pronounced “deck” and is short for “double-ended queue”).

4. Iterate over deque in python - Stack Overflow

   stackoverflow.com/questions/31093766

   Since a deque is a doubly linked list, I should be able to iterate through it in order without any performance cost compared to a list. However, the following will be much slower than iterating through a list

5. Is this deque thread-safe in python? - Stack Overflow

   stackoverflow.com/questions/8554153

   I can't decide whether the following deque is thread-safe. In short, I've created a class with a deque that displays its contents every 1 sec in a new thread (so it won't pause the main program while

6. How are deques in Python implemented, and when are they worse...

   stackoverflow.com/questions/6256983

   So yes, a deque is a (doubly-)linked list as another answer suggests. Elaborating: What this means is that Python lists are much better for random-access and fixed-length operations, including slicing, while deques are much more useful for pushing and popping things off the ends, with indexing (but not slicing, interestingly) being possible but ...

7. python - efficient circular buffer? - Stack Overflow

   stackoverflow.com/questions/4151320

   4. This is not an efficient way to implement circular buffer because pop (0) is O (n) operation in the list. pop (0) removes the first element in the list and all elements have to be shifted to the left. Use collections.deque with maxlen attribute instead. deque has O (1) operation for append and pop. – Vlad Bezden.

8. How to check deque length in Python - Stack Overflow

   stackoverflow.com/questions/12548481

   I hesitate to edit a question with this many upvotes, but I think there is a case for using a word other than "queue" in the question title and body, since many google searches about python Queue are going to end up here, and the accepted answer simply will not work for a Queue.

9. python - Clear all items from the queue - Stack Overflow

   stackoverflow.com/questions/6517953

   48. You just can not clear the queue, because every put also add the unfinished_tasks member. The join method depends on this value. And all_tasks_done needs to be notified also. with q.mutex: q.queue.clear() q.all_tasks_done.notify_all() q.unfinished_tasks = 0. or in decent way, use get and task_done pair to safely clear the tasks.

10. python - collections.deque get index of element by value - Stack...

    stackoverflow.com/questions/36964499

    For list we can get index of element list_name.index(3) How to get index of item in deque. ex: d_list = deque([1, 2, 3, 4]) what is the best way to get the index of ...

11. queue - How Does Deque Work in Python - Stack Overflow

    stackoverflow.com/questions/38679914

    18. A deque is a generalization of stack and a queue (It is short for "double-ended queue"). Thus, the pop () operation still causes it to act like a stack, just as it would have as a list. To make it act like a queue, use the popleft () command. Deques are made to support both behaviors, and this way the pop () function is consistent across ...