你链接到的示例是错误的，并且异常实际上是在调用警报处理程序而不是读取块时发生的。最好试试这个：
import signalTIMEOUT = 5 # number of seconds your want for timeoutdef interrupted(signum, frame): "called when read times out" print 'interrupted!'signal.signal(signal.SIGALRM, interrupted)def input(): try: print 'You have 5 seconds to type in your stuff...' foo = raw_input() return foo except: # timeout return# set alarmsignal.alarm(TIMEOUT)s = input()# disable the alarm after successsignal.alarm(0)print 'You typed', s
