![]() ![]() Make sure your tests are in a separate file (if the source is in foo/ordered_set_priority_queue.py you'd typically place them in test/foo/test_ordered_set_priority_queue.py this allows you-assuming you've added all the _init_.pys-to do python3 -m unittest discover.Repeating the module name tends to be tedious and in many cases doesn't add much. For imports, I generally prefer from unittest import TestCase.Rename get to pop (you even call it this in the comment) for parity with sets (and python's heap implementation).Rename size to _len_ so you can do len(queue).lists and other builtins are falsy when empty Instead of empty define a _bool_ which returns True if the queue has items.I'd do assert removed_count in (0, 1) (tuples are preferred when you don't need to modify the object).If you want to return a bool, then name it discard (also for parity). If you name it remove for parity with how the builtin set does it, I'd have it raise KeyError if item isn't in the queue instead of returning a bool.I'm not sure if I would call it contains, but ntains(item, priority=5) reads better to me. contains is usually spelled _contains_.Thread = threading.Thread(target=add_to_queue, args=(), kwargs=) Queue: OrderedSetPriorityQueue = OrderedSetPriorityQueue()ĭef test_increase_priority(self) -> None:ĭef test_decrease_priority(self) -> None: Verify integrity of custom queue implementation """Internal function used to clean up unused data structures."""Īssert sorted(()) = sorted(self.elem_sets.keys())Ĭlass OrderedSetPriorityQueueTest(unittest.TestCase): """Pop the oldest item from the highest priority.""" Return sum(map(len, self.elem_sets.values())) ![]() """Return True if the queue is completely empty."""Īssert bool(self.elem_sets) = bool(ques) The entry with the old priority will be removed, If it already was queued but with a different priority, If is has not been queued yet, it is added and True is returned. """Returns False if item already is queued with the same priority. """Remove an item from the queue, disregarding its stored priority."""įor set_prio, elem_set in self.elem_ems():ĭef put(self, item: T, priority: int = 0) -> bool: """Check if the item is already queued with this exact priority.""" """Check if the item is already queued."""ĭef contains_with_prio(self, item: T, priority: int) -> bool: ndition_var = threading.Condition(threading.RLock()) """A thread-safe priority queue keeping its elements unique""" """A thread-safe priority queue keeping its elements uniqueįrom typing import DefaultDict, Deque, Set, Generic, TypeVarĬlass OrderedSetPriorityQueue(Generic): I would be happy to hear your ideas on how the code can be improved. No item can occur more than once in the queue.Every item in the queue can have a priority assigned.This class is intended to be used in situations where queue.Queue does not suffice, because the following two properties are needed. ![]() task_done () print ( f ' seconds' ) asyncio. sleep ( sleep_for ) # Notify the queue that the "work item" has been processed. get () # Sleep for the "sleep_for" seconds. Import asyncio import random import time async def worker ( name, queue ): while True : # Get a "work item" out of the queue. Queues can be used to distribute workload between several QueueFull ¶Įxception raised when the put_nowait() method is called This exception is raised when the get_nowait() method LifoQueue ¶Ī variant of Queue that retrieves most recently addedĮntries first (last in, first out). PriorityQueue ¶Ī variant of Queue retrieves entries in priority order Raises ValueError if called more times than there were Items have been processed (meaning that a task_done()Ĭall was received for every item that had been put() If a join() is currently blocking, it will resume when all Queue that the processing on the task is complete. For each get() used toįetch a task, a subsequent call to task_done() tells the Indicate that a formerly enqueued task is complete. If no free slot is immediately available, raise QueueFull. Put an item into the queue without blocking. ![]() If the queue is full, wait until aįree slot is available before adding the item. Task_done() to indicate that the item was retrieved and all The count goes down whenever a consumer coroutine calls The count of unfinished tasks goes up whenever an item is added Return an item if one is immediately available, else raiseīlock until all items in the queue have been received and processed. Remove and return an item from the queue. If the queue was initialized with maxsize=0 (the default), Return True if there are maxsize items in the queue. Return True if the queue is empty, False otherwise. Changed in version 3.10: Removed the loop parameter. ![]()
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