Question

我正在尝试运行两个线程，每个线程都传递一个参数进行处理。但是，似乎线程按顺序运行，而不是并行运行。证人：

$ cat threading-stackoverflow.py 
import threading

class CallSomebody (threading.Thread):
        def __init__(self, target, *args):
                self._target = target
                self._args = args
                threading.Thread.__init__(self)

        def run (self):
                self._target(*self._args)

def call (who):
        while True:
                print "Who you gonna call? %s" % (str(who))

a=CallSomebody(call, 'Ghostbusters!')
a.daemon=True
a.start()
a.join()

b=CallSomebody(call, 'The Exorcist!')
b.daemon=True
b.start()
b.join()

$ python threading-stackoverflow.py 
Who you gonna call? Ghostbusters!
Who you gonna call? Ghostbusters!
Who you gonna call? Ghostbusters!
Who you gonna call? Ghostbusters!
Who you gonna call? Ghostbusters!
Who you gonna call? Ghostbusters!
Who you gonna call? Ghostbusters!

我希望有一些行返回Ghostbusters!而其他行返回The Exorcist!，但Ghostbusters!行会永远继续。为每个线程获得一些处理器时间必须重构什么？

Answer 1

这是您的问题：在a.join()

之前致电b.start()

你想要更像的东西：

a=CallSomebody(call, 'Ghostbusters!')
a.daemon=True
b=CallSomebody(call, 'The Exorcist!')
b.daemon=True
a.start()
b.start()
a.join()
b.join()

Python中的线程，带有发送到线程的参数

1 个答案: