#!/usr/bin/env python
# -*- coding:utf-8 -*-
import queue
import threading
# import queue# q = queue.Queue(maxsize=0)  # 构造一个先进显出队列，maxsize指定队列长度，为0 时，表示队列长度无限制。
#
# q.join()    # 等到队列为空的时候，在执行别的操作
# q.qsize()   # 返回队列的大小 （不可靠）
# q.empty()   # 当队列为空的时候，返回True 否则返回False （不可靠）
# q.full()    # 当队列满的时候，返回True，否则返回False （不可靠）
# q.put(item, block=True, timeout=None) #  将item放入Queue尾部，item必须存在，可以参数block默认为True,表示当队列满时，会等待队列给出可用位置，
# # 　　　　　　　　　　　　　　　　　　　　　　　　 为False时为非阻塞，此时如果队列已满，会引发queue.Full 异常。 可选参数timeout，表示 会阻塞设置的时间，过后，
# # 　　　　　　　　　　　　　　　　　　　　　　　　  如果队列无法给出放入item的位置，则引发 queue.Full 异常
# q.get(block=True, timeout=None) #   移除并返回队列头部的一个值，可选参数block默认为True，表示获取值的时候，如果队列为空，则阻塞，为False时，不阻塞，
# # 　　　　　　　　　　　　　　　　　　　　　　若此时队列为空，则引发 queue.Empty异常。 可选参数timeout，表示会阻塞设置的时候，过后，如果队列为空，则引发Empty异常。
# q.put_nowait(item) #   等效于 put(item,block=False)
# q.get_nowait() #    等效于 get(item,block=False)
message = queue.Queue(10)def producer(i):print("put:",i)# while True:
    message.put(i)def consumer(i):# while True:msg = message.get()print(msg)for i in range(12):t = threading.Thread(target=producer, args=(i,))t.start()for i in range(10):t = threading.Thread(target=consumer, args=(i,))t.start()
qs = message.qsize()
print("当前消息队列的长度为:%d"%(qs))
print("当前消息队列的长度为:",qs)

    import threadingdef f0():passdef f1(a1,a2)：time.sleep(10)f0()t = threading.Thread(target=f1,args(111,222,))t.setDaemon(True)  #默认false 主线程将等待执行完成后结束，设置为true后主线程将不在等待
    t.start()t = threading.Thread(target=f1,args(111,222,))t.start()t = threading.Thread(target=f1,args(111,222,))t.start()t = threading.Thread(target=f1,args(111,222,))t.start()

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from multiprocessing import Pool
import time
def myFun(i):time.sleep(2)return i+100def end_call(arg):print("end_call",arg)# print(p.map(myFun,range(10)))
if __name__ == "__main__":p = Pool(5)for i in range(10):p.apply_async(func=myFun,args=(i,),callback=end_call)print("end")p.close()p.join()

#!/usr/bin/env python
# -*- coding:utf-8 -*-from multiprocessing import  Pool
import timedef f1(a):time.sleep(1)print(a)return 1000
def f2(arg):print(arg)if __name__ =="__main__":pool = Pool(5)for i in range(50):pool.apply_async(func=f1, args=(i,),callback=f2)# pool.apply(func=f1, args=(i,))print('<<=================>>')pool.close()pool.join()

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import queue
import threading
import timeclass ThreadPool(object):def __init__(self, max_num=20):self.queue = queue.Queue(max_num)for i in range(max_num):self.queue.put(threading.Thread)def get_thread(self):return self.queue.get()def add_thread(self):self.queue.put(threading.Thread)def func(pool,a1):time.sleep(2)print(a1)pool.add_thread()p = ThreadPool(10)for i in range(100):#获得类thread = p.get_thread()#对象 = 类（）#
    t = thread(target=func,args=(p,i,))t.start()
"""
pool = ThreadPool(10)def func(arg, p):print argimport timetime.sleep(2)p.add_thread()for i in xrange(30):thread = pool.get_thread()t = thread(target=func, args=(i, pool))t.start()
"""# p = ThreadPool()
# ret = p.get_thread()
#
# t = ret(target=func,)
# t.start()

#!/usr/bin/env python
# -*- coding:utf-8 -*-import queue
import threading
import contextlib
import timeStopEvent = object()class ThreadPool(object):def __init__(self, max_num, max_task_num = None):if max_task_num:self.q = queue.Queue(max_task_num)else:self.q = queue.Queue()# 多大容量self.max_num = max_numself.cancel = Falseself.terminal = False# 真实创建的线程列表self.generate_list = []# 空闲线程数量self.free_list = []def run(self, func, args, callback=None):"""线程池执行一个任务:param func: 任务函数:param args: 任务函数所需参数:param callback: 任务执行失败或成功后执行的回调函数，回调函数有两个参数1、任务函数执行状态；2、任务函数返回值（默认为None，即：不执行回调函数）:return: 如果线程池已经终止，则返回True否则None"""if self.cancel:returnif len(self.free_list) == 0 and len(self.generate_list) < self.max_num:self.generate_thread()w = (func, args, callback,)self.q.put(w)def generate_thread(self):"""创建一个线程"""t = threading.Thread(target=self.call)t.start()def call(self):"""循环去获取任务函数并执行任务函数"""# 获取当前进程current_thread = threading.currentThread()self.generate_list.append(current_thread)# 取任务event = self.q.get()while event != StopEvent:# 是元组=》是任务# 解开任务包# 执行任务
func, arguments, callback = eventtry:result = func(*arguments)success = Trueexcept Exception as e:success = Falseresult = Noneif callback is not None:try:callback(success, result)except Exception as e:passwith self.worker_state(self.free_list, current_thread):if self.terminal:event = StopEventelse:event = self.q.get()else:# 不是元组，不是任务# 标记：我空闲了# 执行后线程死掉
            self.generate_list.remove(current_thread)def close(self):"""执行完所有的任务后，所有线程停止"""self.cancel = Truefull_size = len(self.generate_list)while full_size:self.q.put(StopEvent)full_size -= 1def terminate(self):"""无论是否还有任务，终止线程"""self.terminal = Truewhile self.generate_list:self.q.put(StopEvent)self.q.empty()@contextlib.contextmanagerdef worker_state(self, state_list, worker_thread):"""用于记录线程中正在等待的线程数"""state_list.append(worker_thread)try:yieldfinally:state_list.remove(worker_thread)# How to use
pool = ThreadPool(5)def callback(status, result):# status, execute action status# result, execute action return valuepassdef action(i):print(i)for i in range(30):#将任务放在队列#着手开始处理任务#创建线程（有空闲线程则不创建；不高于线程池的限制；根据任务个数判断）  =》线程去队列中去任务ret = pool.run(action, (i,), callback)time.sleep(5)
print(len(pool.generate_list), len(pool.free_list))
print(len(pool.generate_list), len(pool.free_list))
# pool.close()
# pool.terminate()

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import  queue
import  contextlib
"""
q = queue.Queue()
li = []# li.append(1)
# q.get()
# li.remove(1)@contextlib.contextmanager
def worker_stater(xxx,val):xxx.append(val)try:yield 123finally:xxx.remove(val)q.put("john")
with worker_stater(li,1) as f:print('before',li)print(f)q.get()passpassprint('after',li)
"""@contextlib.contextmanager
def myopen(file_path,mode):f = open(file_path,mode,encoding='utf-8')try:yield  ffinally:f.close()with myopen('index.html','r') as file_obj:print(file_obj.readline())

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import  geventdef foo():print('Running in foo')gevent.sleep(0)  #切换协程print('Explicit context switch to foo agein')
def bar():print('Running in bar')gevent.sleep(0)  #切换协程print('Explicit context switch back to bar agein')gevent.joinall([gevent.spawn(foo),gevent.spawn(bar),
])

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from gevent import  monkey;monkey.patch_all()
import  gevent
import  requestsdef f(url):print('GET:%s' % url)resp = requests.get(url)data = resp.textprint(url,len(data))gevent.joinall([gevent.spawn(f,'http://www.python.org/'),gevent.spawn(f,'https://www.yahoo.com/'),gevent.spawn(f,'https://github.com/'),
])

#!/usr/bin/env python
# -*- coding:utf-8 -*-from greenlet import  greenletdef test1():print(12)gr2.switch()print(34)gr2.switch()def test2():print(56)gr1.switch()print(78)gr1.switch()gr1 = greenlet(test1)
gr2 = greenlet(test2)gr1.switch()