直接在handler的函数体中写一个pass 或设置signal.SIG_DFL(默认执行)、signal.SIG_IGN(程序忽略该信号。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #-*-coding:utf-8-importsignal defalert_handler(signum,frame):print('Signal handler called with
import signal def handler(signum, frame): print 'Signal handler called with signal', signum raise TimeOutError, "TimeOut!" try: # Set the signal handler and a 1-second alarmsignal.signal(signal.SIGALRM, handler) signal.alarm(1) # This while loop hang indefinitely while True: print 'a',...
在Python中,可以注册信号为signal.SIG_DFL来达到这个目的: # 删除信号处理程序signal.signal(signal.SIGINT,signal.SIG_DFL)print("Signal handler removed. Press Ctrl+C to terminate the program.")whileTrue:time.sleep(1) 1. 2. 3. 4. 5. 6. 在这里,通过将SIGINT信号的处理程序设置为signal.SIG_DFL,...
/usr/bin/env python3# -*- coding:utf-8 -*-importsignalimporttimeimportdatetimedefhandler(sig,frame):print(datetime.datetime.now())print("handler function")if__name__=="__main__":signal.signal(signal.SIGALRM,handler)print(datetime.datetime.now())signal.alarm(5)time.sleep(10)print(datetime...
SignalHandler+handle_signal(signum: int, frame: object)+register_signal(signal_type: int) 架构解析 在应用程序中,信号的使用常常是与事件驱动架构结合的。状态图展示了系统在不同信号下的状态变化: On waiting for signalsSignal receivedSignal handledRunningWaitingHandling ...
"signal handler must be signal.SIG_IGN, signal.SIG_DFL, or a callable object"); returnNULL; } else func = signal_handler; ——>注意signal_handler if(PyOS_setsig(sig_num, func) == SIG_ERR) { PyErr_SetFromErrno(PyExc_RuntimeError); ...
import signal # Define signal handler function def myHandler(signum, frame): print('I received: ', signum) # register signal.SIGTSTP's handler signal.signal(signal.SIGTSTP, myHandler) signal.pause() print('End of Signal Demo') 在主程序中,我们首先使用signal.signal()函数来预设信号处理函数。然...
直接在handler的函数体中写一个pass 或设置signal.SIG_DFL(默认执行)、signal.SIG_IGN(程序忽略该信号。 # -*- coding: utf-8 - import signal def alert_handler(signum, frame): print('Signal handler called with signal', signum) # 1.设置定时信号 signal.signal(signal.SIGALRM, alert_handler) print...
问题本身的来源很简单, CPython 的执行过程就是解释 bytecode 的过程, signal handler 会在中途插入修改相关状态,让解释器在合适的时候暂停当前代码执行,转去执行 Python API 设定的 "signal handler" --- 当然,引号是因为这个 handler 不同于操作系统中常讲的 signal handler。一般来说即使是 C 的程序里要使用...
import signal, os # 定义一个信号处理函数,该函数打印收到的信号,然后raise IOError def handler(signum, frame): print 'Signal handler called with signal', signum raise IOError("Couldn't open device!") #对SIGALRM(终止)设置处理的handler, 然后设置定时器,5秒后触发SIGALRM信号 ...