text: import asyncio
  import threading
  from asyncio import QueueEmpty as AsyncQueueEmpty
  from asyncio import QueueFull as AsyncQueueFull
  from collections import deque
  from heapq import heappop, heappush
  from queue import Empty as SyncQueueEmpty
  from queue import Full as SyncQueueFull
  from typing import Any, Callable, Deque, Generic, List, Optional, Set, TypeVar
  
  __version__ = "0.6.0"
  __all__ = ("Queue", "PriorityQueue", "LifoQueue")
  
  
  T = TypeVar("T")
  OptInt = Optional[int]
  
  
  current_loop = getattr(asyncio, "get_running_loop", None)
  if current_loop is None:
      current_loop = asyncio.get_event_loop
  
  
  class Queue(Generic[T]):
      def __init__(self, maxsize: int = 0) -> None:
          self._loop = current_loop()
          self._maxsize = maxsize
  
          self._init(maxsize)
  
          self._unfinished_tasks = 0
  
          self._sync_mutex = threading.Lock()
          self._sync_not_empty = threading.Condition(self._sync_mutex)
          self._sync_not_full = threading.Condition(self._sync_mutex)
          self._all_tasks_done = threading.Condition(self._sync_mutex)
  
          self._async_mutex = asyncio.Lock()
          self._async_not_empty = asyncio.Condition(self._async_mutex)
          self._async_not_full = asyncio.Condition(self._async_mutex)
          self._finished = asyncio.Event()
          self._finished.set()
  
          self._closing = False
          self._pending = set()  # type: Set[asyncio.Future[Any]]
  
          def checked_call_soon_threadsafe(
              callback: Callable[..., None], *args: Any
          ) -> None:
              try:
                  self._loop.call_soon_threadsafe(callback, *args)
              except RuntimeError:
                  # swallowing agreed in #2
                  pass
  
          self._call_soon_threadsafe = checked_call_soon_threadsafe
  
          def checked_call_soon(callback: Callable[..., None], *args: Any) -> None:
              if not self._loop.is_closed():
                  self._loop.call_soon(callback, *args)
  
          self._call_soon = checked_call_soon
  
          self._sync_queue = _SyncQueueProxy(self)
          self._async_queue = _AsyncQueueProxy(self)
  
      def close(self) -> None:
          with self._sync_mutex:
              self._closing = True
              for fut in self._pending:
                  fut.cancel()
              self._finished.set()  # unblocks all async_q.join()
              self._all_tasks_done.notify_all()  # unblocks all sync_q.join()
  
      async def wait_closed(self) -> None:
          # should be called from loop after close().
          # Nobody should put/get at this point,
          # so lock acquiring is not required
          if not self._closing:
              raise RuntimeError("Waiting for non-closed queue")
          # give execution chances for the task-done callbacks
          # of async tasks created inside
          # _notify_async_not_empty, _notify_async_not_full
          # methods.
          await asyncio.sleep(0)
          if not self._pending:
              return
          await asyncio.wait(self._pending)
  
      @property
      def closed(self) -> bool:
          return self._closing and not self._pending
  
      @property
      def maxsize(self) -> int:
          return self._maxsize
  
      @property
      def sync_q(self) -> "_SyncQueueProxy[T]":
          return self._sync_queue
  
      @property
      def async_q(self) -> "_AsyncQueueProxy[T]":
          return self._async_queue
  
      # Override these methods to implement other queue organizations
      # (e.g. stack or priority queue).
      # These will only be called with appropriate locks held
  
      def _init(self, maxsize: int) -> None:
          self._queue = deque()  # type: Deque[T]
  
      def _qsize(self) -> int:
          return len(self._queue)
  
      # Put a new item in the queue
      def _put(self, item: T) -> None:
          self._queue.append(item)
  
      # Get an item from the queue
      def _get(self) -> T:
          return self._queue.popleft()
  
      def _put_internal(self, item: T) -> None:
          self._put(item)
          self._unfinished_tasks += 1
          self._finished.clear()
  
      def _notify_sync_not_empty(self) -> None:
          def f() -> None:
              with self._sync_mutex:
                  self._sync_not_empty.notify()
  
          self._loop.run_in_executor(None, f)
  
      def _notify_sync_not_full(self) -> None:
          def f() -> None:
              with self._sync_mutex:
                  self._sync_not_full.notify()
  
          fut = self._loop.run_in_executor(None, f)
          fut.add_done_callback(self._pending.discard)
          self._pending.add(fut)
  
      def _notify_async_not_empty(self, *, threadsafe: bool) -> None:
          async def f() -> None:
              async with self._async_mutex:
                  self._async_not_empty.notify()
  
          def task_maker() -> None:
              task = self._loop.create_task(f())
              task.add_done_callback(self._pending.discard)
              self._pending.add(task)
  
          if threadsafe:
              self._call_soon_threadsafe(task_maker)
          else:
              self._call_soon(task_maker)
  
      def _notify_async_not_full(self, *, threadsafe: bool) -> None:
          async def f() -> None:
              async with self._async_mutex:
                  self._async_not_full.notify()
  
          def task_maker() -> None:
              task = self._loop.create_task(f())
              task.add_done_callback(self._pending.discard)
              self._pending.add(task)
  
          if threadsafe:
              self._call_soon_threadsafe(task_maker)
          else:
              self._call_soon(task_maker)
  
      def _check_closing(self) -> None:
          if self._closing:
              raise RuntimeError("Operation on the closed queue is forbidden")
  
  
  class _SyncQueueProxy(Generic[T]):
      """Create a queue object with a given maximum size.
  
      If maxsize is <= 0, the queue size is infinite.
      """
  
      def __init__(self, parent: Queue[T]):
          self._parent = parent
  
      @property
      def maxsize(self) -> int:
          return self._parent._maxsize
  
      @property
      def closed(self) -> bool:
          return self._parent.closed
  
      def task_done(self) -> None:
          """Indicate that a formerly enqueued task is complete.
  
          Used by Queue consumer threads.  For each get() used to fetch a task,
          a subsequent call to task_done() tells the queue that the processing
          on the task is complete.
  
          If a join() is currently blocking, it will resume when all items
          have been processed (meaning that a task_done() call was received
          for every item that had been put() into the queue).
  
          Raises a ValueError if called more times than there were items
          placed in the queue.
          """
          self._parent._check_closing()
          with self._parent._all_tasks_done:
              unfinished = self._parent._unfinished_tasks - 1
              if unfinished <= 0:
                  if unfinished < 0:
                      raise ValueError("task_done() called too many times")
                  self._parent._all_tasks_done.notify_all()
                  self._parent._loop.call_soon_threadsafe(self._parent._finished.set)
              self._parent._unfinished_tasks = unfinished
  
      def join(self) -> None:
          """Blocks until all items in the Queue have been gotten and processed.
  
          The count of unfinished tasks goes up whenever an item is added to the
          queue. The count goes down whenever a consumer thread calls task_done()
          to indicate the item was retrieved and all work on it is complete.
  
          When the count of unfinished tasks drops to zero, join() unblocks.
          """
          self._parent._check_closing()
          with self._parent._all_tasks_done:
              while self._parent._unfinished_tasks:
                  self._parent._all_tasks_done.wait()
                  self._parent._check_closing()
  
      def qsize(self) -> int:
          """Return the approximate size of the queue (not reliable!)."""
          return self._parent._qsize()
  
      @property
      def unfinished_tasks(self) -> int:
          """Return the number of unfinished tasks."""
          return self._parent._unfinished_tasks
  
      def empty(self) -> bool:
          """Return True if the queue is empty, False otherwise (not reliable!).
  
          This method is likely to be removed at some point.  Use qsize() == 0
          as a direct substitute, but be aware that either approach risks a race
          condition where a queue can grow before the result of empty() or
          qsize() can be used.
  
          To create code that needs to wait for all queued tasks to be
          completed, the preferred technique is to use the join() method.
          """
          return not self._parent._qsize()
  
      def full(self) -> bool:
          """Return True if the queue is full, False otherwise (not reliable!).
  
          This method is likely to be removed at some point.  Use qsize() >= n
          as a direct substitute, but be aware that either approach risks a race
          condition where a queue can shrink before the result of full() or
          qsize() can be used.
          """
          return 0 < self._parent._maxsize <= self._parent._qsize()
  
      def put(self, item: T, block: bool = True, timeout: OptInt = None) -> None:
          """Put an item into the queue.
  
          If optional args 'block' is true and 'timeout' is None (the default),
          block if necessary until a free slot is available. If 'timeout' is
          a non-negative number, it blocks at most 'timeout' seconds and raises
          the Full exception if no free slot was available within that time.
          Otherwise ('block' is false), put an item on the queue if a free slot
          is immediately available, else raise the Full exception ('timeout'
          is ignored in that case).
          """
          self._parent._check_closing()
          with self._parent._sync_not_full:
              if self._parent._maxsize > 0:
                  if not block:
                      if self._parent._qsize() >= self._parent._maxsize:
                          raise SyncQueueFull
                  elif timeout is None:
                      while self._parent._qsize() >= self._parent._maxsize:
                          self._parent._sync_not_full.wait()
                  elif timeout < 0:
                      raise ValueError("'timeout' must be a non-negative number")
                  else:
                      time = self._parent._loop.time
                      endtime = time() + timeout
                      while self._parent._qsize() >= self._parent._maxsize:
                          remaining = endtime - time()
                          if remaining <= 0.0:
                              raise SyncQueueFull
                          self._parent._sync_not_full.wait(remaining)
              self._parent._put_internal(item)
              self._parent._sync_not_empty.notify()
              self._parent._notify_async_not_empty(threadsafe=True)
  
      def get(self, block: bool = True, timeout: OptInt = None) -> T:
          """Remove and return an item from the queue.
  
          If optional args 'block' is true and 'timeout' is None (the default),
          block if necessary until an item is available. If 'timeout' is
          a non-negative number, it blocks at most 'timeout' seconds and raises
          the Empty exception if no item was available within that time.
          Otherwise ('block' is false), return an item if one is immediately
          available, else raise the Empty exception ('timeout' is ignored
          in that case).
          """
          self._parent._check_closing()
          with self._parent._sync_not_empty:
              if not block:
                  if not self._parent._qsize():
                      raise SyncQueueEmpty
              elif timeout is None:
                  while not self._parent._qsize():
                      self._parent._sync_not_empty.wait()
              elif timeout < 0:
                  raise ValueError("'timeout' must be a non-negative number")
              else:
                  time = self._parent._loop.time
                  endtime = time() + timeout
                  while not self._parent._qsize():
                      remaining = endtime - time()
                      if remaining <= 0.0:
                          raise SyncQueueEmpty
                      self._parent._sync_not_empty.wait(remaining)
              item = self._parent._get()
              self._parent._sync_not_full.notify()
              self._parent._notify_async_not_full(threadsafe=True)
              return item
  
      def put_nowait(self, item: T) -> None:
          """Put an item into the queue without blocking.
  
          Only enqueue the item if a free slot is immediately available.
          Otherwise raise the Full exception.
          """
          return self.put(item, block=False)
  
      def get_nowait(self) -> T:
          """Remove and return an item from the queue without blocking.
  
          Only get an item if one is immediately available. Otherwise
          raise the Empty exception.
          """
          return self.get(block=False)
  
  
  class _AsyncQueueProxy(Generic[T]):
      """Create a queue object with a given maximum size.
  
      If maxsize is <= 0, the queue size is infinite.
      """
  
      def __init__(self, parent: Queue[T]):
          self._parent = parent
  
      @property
      def closed(self) -> bool:
          return self._parent.closed
  
      def qsize(self) -> int:
          """Number of items in the queue."""
          return self._parent._qsize()
  
      @property
      def unfinished_tasks(self) -> int:
          """Return the number of unfinished tasks."""
          return self._parent._unfinished_tasks
  
      @property
      def maxsize(self) -> int:
          """Number of items allowed in the queue."""
          return self._parent._maxsize
  
      def empty(self) -> bool:
          """Return True if the queue is empty, False otherwise."""
          return self.qsize() == 0
  
      def full(self) -> bool:
          """Return True if there are maxsize items in the queue.
  
          Note: if the Queue was initialized with maxsize=0 (the default),
          then full() is never True.
          """
          if self._parent._maxsize <= 0:
              return False
          else:
              return self.qsize() >= self._parent._maxsize
  
      async def put(self, item: T) -> None:
          """Put an item into the queue.
  
          Put an item into the queue. If the queue is full, wait until a free
          slot is available before adding item.
  
          This method is a coroutine.
          """
          self._parent._check_closing()
          async with self._parent._async_not_full:
              self._parent._sync_mutex.acquire()
              locked = True
              try:
                  if self._parent._maxsize > 0:
                      do_wait = True
                      while do_wait:
                          do_wait = self._parent._qsize() >= self._parent._maxsize
                          if do_wait:
                              locked = False
                              self._parent._sync_mutex.release()
                              await self._parent._async_not_full.wait()
                              self._parent._sync_mutex.acquire()
                              locked = True
  
                  self._parent._put_internal(item)
                  self._parent._async_not_empty.notify()
                  self._parent._notify_sync_not_empty()
              finally:
                  if locked:
                      self._parent._sync_mutex.release()
  
      def put_nowait(self, item: T) -> None:
          """Put an item into the queue without blocking.
  
          If no free slot is immediately available, raise QueueFull.
          """
          self._parent._check_closing()
          with self._parent._sync_mutex:
              if self._parent._maxsize > 0:
                  if self._parent._qsize() >= self._parent._maxsize:
                      raise AsyncQueueFull
  
              self._parent._put_internal(item)
              self._parent._notify_async_not_empty(threadsafe=False)
              self._parent._notify_sync_not_empty()
  
      async def get(self) -> T:
          """Remove and return an item from the queue.
  
          If queue is empty, wait until an item is available.
  
          This method is a coroutine.
          """
          self._parent._check_closing()
          async with self._parent._async_not_empty:
              self._parent._sync_mutex.acquire()
              locked = True
              try:
                  do_wait = True
                  while do_wait:
                      do_wait = self._parent._qsize() == 0
  
                      if do_wait:
                          locked = False
                          self._parent._sync_mutex.release()
                          await self._parent._async_not_empty.wait()
                          self._parent._sync_mutex.acquire()
                          locked = True
  
                  item = self._parent._get()
                  self._parent._async_not_full.notify()
                  self._parent._notify_sync_not_full()
                  return item
              finally:
                  if locked:
                      self._parent._sync_mutex.release()
  
      def get_nowait(self) -> T:
          """Remove and return an item from the queue.
  
          Return an item if one is immediately available, else raise QueueEmpty.
          """
          self._parent._check_closing()
          with self._parent._sync_mutex:
              if self._parent._qsize() == 0:
                  raise AsyncQueueEmpty
  
              item = self._parent._get()
              self._parent._notify_async_not_full(threadsafe=False)
              self._parent._notify_sync_not_full()
              return item
  
      def task_done(self) -> None:
          """Indicate that a formerly enqueued task is complete.
  
          Used by queue consumers. For each get() used to fetch a task,
          a subsequent call to task_done() tells the queue that the processing
          on the task is complete.
  
          If a join() is currently blocking, it will resume when all items have
          been processed (meaning that a task_done() call was received for every
          item that had been put() into the queue).
  
          Raises ValueError if called more times than there were items placed in
          the queue.
          """
          self._parent._check_closing()
          with self._parent._all_tasks_done:
              if self._parent._unfinished_tasks <= 0:
                  raise ValueError("task_done() called too many times")
              self._parent._unfinished_tasks -= 1
              if self._parent._unfinished_tasks == 0:
                  self._parent._finished.set()
                  self._parent._all_tasks_done.notify_all()
  
      async def join(self) -> None:
          """Block until all items in the queue have been gotten and processed.
  
          The count of unfinished tasks goes up whenever an item is added to the
          queue. The count goes down whenever a consumer calls task_done() to
          indicate that the item was retrieved and all work on it is complete.
          When the count of unfinished tasks drops to zero, join() unblocks.
          """
          while True:
              with self._parent._sync_mutex:
                  self._parent._check_closing()
                  if self._parent._unfinished_tasks == 0:
                      break
              await self._parent._finished.wait()
  
  
  class PriorityQueue(Queue[T]):
      """Variant of Queue that retrieves open entries in priority order
      (lowest first).
  
      Entries are typically tuples of the form:  (priority number, data).
  
      """
  
      def _init(self, maxsize: int) -> None:
          self._heap_queue = []  # type: List[T]
  
      def _qsize(self) -> int:
          return len(self._heap_queue)
  
      def _put(self, item: T) -> None:
          heappush(self._heap_queue, item)
  
      def _get(self) -> T:
          return heappop(self._heap_queue)
  
  
  class LifoQueue(Queue[T]):
      """Variant of Queue that retrieves most recently added entries first."""
  
      def _qsize(self) -> int:
          return len(self._queue)
  
      def _put(self, item: T) -> None:
          self._queue.append(item)
  
      def _get(self) -> T:
          return self._queue.pop()
  