Python中线程Timeout的使用

q6542125

#!/usr/bin/python　　
import threading
　　
import sys
　　
class KThread(threading.Thread):
　　"""Subclass of threading.Thread, with a kill() method."""
　　def __init__(self, *args, **kwargs):
　　threading.Thread.__init__(self, *args, **kwargs)
　　self.killed = False
　　def start(self):
　　"""Start the thread."""
　　self.__run_backup = self.run
　　"""Force the Thread to install our trace."""
　　self.run = self.__run
　　threading.Thread.start(self)
　　def __run(self):
　　"""Hacked run function, which installs the trace."""
　　sys.settrace(self.globaltrace)
　　self.__run_backup()
　　self.run = self.__run_backup
　　def globaltrace(self, frame, why, arg):
　　if why == 'call':
　　return self.localtrace
　　else:
　　return None
　　def localtrace(self, frame, why, arg):
　　if self.killed:
　　if why == 'line':
　　raise SystemExit()
　　return self.localtrace
　　def kill(self):
　　self.killed = True