python3 queue多线程通信

from queue import Queue
from queue import LifoQueue
from queue import

from queue import Queue
from threading import Thread
# 用来表示终止的特殊对象
_sentinel = object()
# A thread that produces data
def producer(out_q):
for i in range(10):
print("生产")
out_q.put(i)
out_q.put(_sentinel)
# A thread that consumes data
def consumer(in_q):
while True:
data = in_q.get()
if data is _sentinel:
in_q.put(_sentinel)
break
else:
print("消费", data)
# Create the shared queue and launch both threads
q = Queue()
t1 = Thread(target=consumer, args=(q,))
t2 = Thread(target=producer, args=(q,))
t1.start()
t2.start()

import heapq
import threading
class PriorityQueue:
def __init__(self):
self._queue = []
self._count = 0
self._cv = threading.Condition()
def put(self, item, priority):
with self._cv:
heapq.heappush(self._queue, (-priority, self._count, item))
self._count += 1
self._cv.notify()
def get(self):
with self._cv:
while len(self._queue) == 0:
self._cv.wait()
return heapq.heappop(self._queue)[-1]

from queue import Queue
from threading import Thread
class Producer(Thread):
def __init__(self, q):
super().__init__()
self.count = 5
self.q = q
def run(self):
while self.count > 0:
print("生产")
if self.count == 1:
self.count -= 1
self.q.put(2)
else:
self.count -= 1
self.q.put(1)
class Consumer(Thread):
def __init__(self, q):
super().__init__()
self.q = q
def run(self):
while True:
print("消费")
data = self.q.get()
if data == 2:
print("stop because data=", data)
# 任务完成，从队列中清除一个元素
self.q.task_done()
break
else:
print("data is good,data=", data)
# 任务完成，从队列中清除一个元素
self.q.task_done()
def main():
q = Queue()
p = Producer(q)
c = Consumer(q)
p.setDaemon(True)
c.setDaemon(True)
p.start()
c.start()
# 等待队列清空
q.join()
print("queue is complete")
if __name__ == '__main__':
main()

import logging
import logging.handlers
import threading
import queue

log_mgr = None
todo_queue = queue.Queue()
done_queue = queue.Queue()
class LogMgr:
def __init__(self, logpath):
self.LOG = logging.getLogger('log')
loghd = logging.handlers.RotatingFileHandler(logpath, "a", 0, 1)
fmt = logging.Formatter("%(asctime)s %(threadName)-10s %(message)s", "%Y-%m-%d %H:%M:%S")
loghd.setFormatter(fmt)
self.LOG.addHandler(loghd)
self.LOG.setLevel(logging.INFO)
def info(self, msg):
if self.LOG is not None:
self.LOG.info(msg)
class Worker(threading.Thread):
global log_mgr
def __init__(self, name):
threading.Thread.__init__(self)
self.name = name
def run(self):
while True:
try:
task = todo_queue.get(False)
if task:
log_mgr.info("HANDLE_TASK: %s" % task)
done_queue.put(1)
except queue.Empty:
break
return
def main():
global log_mgr
log_mgr = LogMgr("mylog")
for i in range(30):
todo_queue.put("data"+str(i))
workers = []
for i in range(3):
w = Worker("worker"+str(i))
workers.append(w)
for i in range(3):
workers[i].start()
for i in range(3):
workers[i].join()
total_num = done_queue.qsize()
log_mgr.info("TOTAL_HANDLE_TASK: %d" % total_num)
exit(0)
if __name__ == '__main__':
main()