Question

假设我有以下python3程序：

from threading import Timer
import time

thread = Timer(600, print, args=['I am running'])
thread.start()

while threading.activeCount() > 1:
    {{Function to calculate time until thread will start running}}
    print ("Thread will start in %d seconds" % {get above value})
    time.sleep(10)

我正在看的是有点复杂，有多个线程，但实质上，对于给定的Timer线程，有没有办法检查它以查看它何时被安排运行？

Answer 1

我不确定我说得对你说的是什么，但你可能想要这样的东西：

from threading import Thread
import time

thread = Timer(600, print, args=['I am running'])
thread.start()

class ThreadTimeoutLauncher(Thread):
    def __init__(self, timeout, cb, *args, **kwarg):
        super(Thread, self).__init__()
        self.timeout = timeout
        self._cb = cb
        self._args = args
        self._kwarg = kwarg

    def run():
        print ("Thread will start in %d seconds" % self.timeout)
        while self.timeout > 0:
            time.sleep(1)
            self.timeout -= 1
        self.cb(*self._args, **self._kwarg)

这里的想法是重新创建一个Timer计数线程，该计时器线程将在时间结束前倒计时，并在执行此操作时更新“超时值”。当它结束时，它启动Thread事件。所以当你这样做时：

def foo():
    print "Thread launched!"

t = ThreadTimeoutLauncher(600, foo)
t.start()
while True:
    time.sleep(0.5)
    print "thread will be launched in: %d sec." % t.timeout

也可以从Timer继承并更改Timer的run（）方法，但它意味着 UTSL ; - ）

有没有办法检查线程何时.Timer将运行？

1 个答案: