from time import sleep,ctime def loop(nloop,lock): print 'start loop', nloop, 'at:', ctime() sleep(1) print 'loop', nloop, 'done at:', ctime() #解锁 lock.release() def main(): print 'starting at:', ctime() locks =
It is like a while loop but it is executed at least once. Example: Python 1 2 3 4 5 6 7 i = 1 while True: print(i) i = i + 1 if i > 5: break Output: Python While True Loop There is a concept of declaring a condition to be true, without evaluating any expression. ...
def loop(nloop, nsec): print('start loop', nloop, 'at:', ctime()) sleep(nsec) print('loop', nloop, 'done at:', ctime()) def main(): print('starting at:', ctime()) threads = [] nloops = range(len(loops)) for i in nloops: t = threading.Thread(target=loop, args=(i...
1 import threading 2 from time import sleep, ctime 3 4 loops = [4,2] 5 6 def loop(nloop, nsec): 7 print('start loop %s at:%s' % (nloop, ctime())) 8 sleep(nsec) 9 print('loop %s done at:%s' % (nloop, ctime())) 10 11 def main(): 12 print("starting at:%s" % c...
async def main(): try: # We do not know the timeout when starting, so we pass ``None``. async with asyncio.timeout(None) as cm: # We know the timeout now, so we reschedule it. new_deadline = get_running_loop().time() + 10 cm.reschedule(new_deadline) await long_running_ta...
run(dotasks())self.message_queue.task_done()defstart(self):defworker():self.running=Trueasyncio.run(self.main())thread=threading.Thread(target=worker)thread.daemon=Truethread.start()self.thread=threadprint("broker started at:",thread)defclose(self):self.running=Falsetime.sleep(1)self....
loop.run_until_complete(future)6.2.2 asyncio库中的异步装饰器应用 import asyncio # Python 3.7及以上版本 @asyncio.run async def main(): print("Starting task...") await asyncio.sleep(1) print("Task completed.") # Python 3.5及以上版本 ...
我们首先通过调用get_event_loop()方法获取 AsyncIO 事件循环。get_event_loop()方法返回在代码运行的平台上的 AsyncIO 的最佳事件循环实现。 AsyncIO 实现了多个事件循环,程序员可以使用。通常,对get_event_loop()的简单调用将返回系统解释器正在运行的最佳事件循环实现。 一旦我们创建了循环,现在我们通过使用create_tas...
Lines starting with a # are ignored.pyenv which displays which real executable would be run when you invoke via a shim. E.g. if you have 3.3.6, 3.2.1 and 2.5.2 installed of which 3.3.6 and 2.5.2 are selected and your system Python is 3.2.5, pyenv which python2.5 should displa...
When defining a function inside a loop that uses the loop variable in its body, the loop function's closure is bound to the variable, not its value. The function looks up x in the surrounding context, rather than using the value of x at the time the function is created. So all of ...