sys.exit(n)退出程序引发SystemExit异常,可以捕获异常执行些清理工作。n默认值为0,表示正常退出,其他都是非正常退出。还可以sys.exit(“sorry, goodbye!”); 一般主程序中使用此退出。 os._exit(n),直接退出, 不抛异常, 不执行相关清理工作。常用在子进程的退出。 exit()/quit(),跑出SystemExit异常。一般在交...
sys.exit()和os._exit()都是用来退出Python程序的函数，但它们之间有一些区别：sys.exit()是Python的...
from PyQt5.QtWidgetsimportQApplication,QMainWindowif__name__=='__main__':app=QApplication(sys.argv)MainWindow=QMainWindow()ui=test.Ui_Dialog()ui.setupUi(MainWindow)MainWindow.show()sys.exit(app.exec_()) 参考资料: [1] PyQt5在Pycharm中配置(https://blog.csdn.net/qq_35451572/article/detail...
Python program to demonstrate atexit module import atexit Using register() as a decorator @atexit.register def goodbye(): print("GoodBye.") ``` 输出: ```py GoodBye. ``` unregister(): The unregister() function removes the specified fun from the functions defined in the program. It provides...
Options and arguments (and corresponding environment variables): -c cmd : program passed in as string (terminates option list) -d : debug output from parser (also PYTHONDEBUG=x) -E : ignore environment variables (such as PYTHONPATH) -h : print this help message and exit [ etc. ] ...
There are several commands you can use to exit a program in Python. Some of these commands include: The quit() function The exit() function The sys.exit() function The os._exit() function We will discuss each exit command in detail. The quit() Function The first Python exit command we...
-c cmd : program passed in as string (terminates option list) -d : debug output from parser (also PYTHONDEBUG=x) -E : ignore environment variables (such as PYTHONPATH) -h : print this help message and exit [ etc. ] 1. 2.
1$ Python --help2usage: Python [option] ... [-c cmd | -m mod | file | -] [arg] ...3Optionsandarguments (andcorresponding environment variables):4-B : don't write .py[co] files on import; also PYTHONDONTWRITEBYTECODE=x5-c cmd : program passedinas string (terminates option list...
importthreadingimporttimeimportsysdeffunc():whileTrue:time.sleep(0.5)print('Thread alive, and it won'tdieonprogramtermination')t1=threading.Thread(target=func)t1.start()time.sleep(2)sys.exit() 请注意,线程t1保持活动状态,并防止主程序通过sys.exit()退出。 在Python中,任何活动的非守护线程都会阻止主...
lnterrupt Execution 中断执行 Stop a running program 停止正在运行的程序。 图6 Shell菜单 六、调试(Debug)菜单 这个菜单也只存在于Shell当中,IDLE中是没有的。 Debug menu(Shell window only) 调试菜单(仅限Shell窗口) Go to File/Line 转到文件/行 Look on the current line:with the cursor,and the line...