如果在UNIX上运行，则可以使用信号包：
In [1]: import signal
# Register an handler for the timeout
In [2]: def handler(signum, frame):
...: print("Forever is over!")
...: raise Exception("end of time")
...:
# This function *may* run for an indetermined time...
In [3]: def loop_forever():
...: import time
...: while 1:
...: print("sec")
...: time.sleep(1)
...:
...:
# Register the signal function handler
In [4]: signal.signal(signal.SIGALRM, handler)
Out[4]: 0
# Define a timeout for your function
In [5]: signal.alarm(10)
Out[5]: 0
In [6]: try:
...: loop_forever()
...: except Exception, exc:
...: print(exc)
....:
sec
sec
sec
sec
sec
sec
sec
sec
Forever is over!
end of time
# Cancel the timer if the function returned before timeout
# (ok, mine won't but yours maybe will :)
In [7]: signal.alarm(0)
Out[7]: 0
调用后10秒钟，将调用alarm.alarm(10)处理程序。这引发了一个异常，你可以从常规Python代码中拦截该异常。
该模块不能很好地与线程配合使用（但是，谁可以呢？）
请注意，由于发生超时时会引发异常，因此该异常可能最终在函数内部被捕获并被忽略，例如一个这样的函数：
def loop_forever():
while 1:
print('sec')
try:
time.sleep(10)
except:
continue
602392714
清零编程群