sys.exit()可以接受一个可选的整数参数,代表退出状态码,0通常表示正常退出,而非0表示异常退出。 import sys def main(): print("This is a program that will exit now.") sys.exit(0) # 使用0表示程序正常退出 main() 在上述代码中,sys.exit(0)会立即终止程序的运行,并返回状态码0给操作系统。因为它...
def handle_signal(signum, frame): print(f"Received signal {signum}. Exiting gracefully.") exit(0) signal.signal(signal.SIGINT, handle_signal) while True: print("Running...") time.sleep(1) 在这个例子中,自定义信号处理程序handle_signal捕获SIGINT信号,并在接收到信号时执行清理操作。 七、子进程...
signal.signal(signal.SIGTERM, self.exit_gracefully) def exit_gracefully(self, *args): self.kill_now = True if __name__ == '__main__': killer = GracefulKiller() while not killer.kill_now: time.sleep(1) print("doing something in a loop ...") print("End of the program. I was ...
<<person>>DeveloperA user who develops Python applications<<system>>Python ApplicationThe application being developed<<container>>Exit Management[Handles exits]<<container>>Exception Handler[Handles exceptions gracefully]DevelopsUses for exit controlUses for error handlingPython Application Architecture 源码分析...
print("End of the program. I was killed gracefully") net2count=1 self.netcount=1 ifname== 'main': killer = GracefulKiller() while killer.netcount > 1: if not killer.kill_now: killer.exit_while() while not killer.kill_now:
Without daemon threads, you'd have to keep track of them, and tell them to exit, before your program can completely quit. By setting them as daemon threads, you can let them run and forget about them, and when your program quits, any daemon threads are killed automatically. ...
PythonProgramOperatingSystemUserPythonProgramOperatingSystemUsersend SIGTERM signalnotify signalexecute handlerexit gracefully 这个图说明了当用户发送信号时,操作系统如何通知 Python 程序,并调用指定的信号处理器执行相应的操作。 小结 处理KILL 信号在 Python 应用中至关重要。通过使用 Python 的signal模块,我们能够捕获...
Question 15: Fill in the blanks in this code to catch KeyboardInterrupt and stop the program gracefully: try: while True: print("Processing...") except ___: print("Terminating...") ▼ Question 16: What happens if a user sends an interrupt signal (e.g., Ctrl+C) while the program ...
当我们谈论“异常”时,我们可能会说 “The program throws an exception when dividing by zero.” (程序在除零时抛出了一个异常)。请注意,英语中的 “error” 和“exception” 都是名词,我们可以用 “encounter”(遇到)或者 “throw”(抛出)这样的动词来描述我们与它们的交互。
As is standard practice in theUNIXworld, when the script is passed flags it doesn't understand, you print out a summary of proper usage and exit gracefully. Note that I haven't shown theusagefunction here. You would still need to code that somewhere and have it print out the appropriate...