exit

问题 This question already has answers here : Why is “except: pass” a bad programming practice? (16 answers) Closed 5 years ago . Python 2.7.5 (default, Feb 26 2014, 13:43:17) [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import sys >>> try: ... sys.exit() ... except: ... print "in except" ... in except >>> try: ... sys.exit(0) ... except: ... print "in except" ... in except >>> try: ... sys.exit(1) ... except: ... print

问题 In my simple custom shell I'm reading commands from the standard input and execute them with execvp(). Before this, I create a fork of the current process and I call the execvp() in that child process, right after that, I call exit(0). Something like this: pid = fork(); if(pid == -1) { perror("fork"); exit(1); } if(pid == 0) { // CHILD PROCESS CODE GOES HERE... execvp(pArgs[0], pArgs); exit(0); } else { // PARENT PROCESS CODE GOES HERE... } Now, the commands run with execvp() can return

问题 Could someone explain the key differences between os.Exit() and panic() and how they are used in practice in Go? 回答1: First of all, whenever you have a "how it is used in practice" question, a good way to start is to search the Go source code (or any big enough Go code base, really), and the package docs for answers. Now, os.Exit and panic are quite different. panic is used when the program, or its part, has reached an unrecoverable state. When panic is called, including implicitly for run

问题 Using windows MFC C++. I have a third party app that calls a user-defined method in my CWinApp derived class. This method is called after InitInstance(). If there is an error in this method, such that an exception is thrown and caught in a try/catch block, I would like to exit the application from the catch block. What is the canonical and correct way to quit? UPDATE: Serge I believe is right that in InitInstance() returning false is the correct way to quit the application. However, now

问题 I am trying to figure out which I should be using. On closing my WinForm app fires of a Form in Dialog mode. That form runs a Background worker that Syncs the DB with the remote DB and displays it's progress on the "Splash Form." I have a method like so: private void CloseMyApp() { SaveUserSettings(); splashForm = new SplashForm(); splashForm.ShowDialog(); Application.ExitThread(); //Application.Exit(); } which is what I call to close my app from Menu --> Exit and in the Form_FormClosing()

问题 How should I quit a Qt Program, e.g when loading a data file, and discovered file corruption, and user need to quit this app or re-initiate data file? Should I: call exit(EXIT_FAILURE) call QApplication::quit() call QCoreApplication::quit() And difference between (2) and (3)? 回答1: QApplication is derived from QCoreApplication and thereby inherits quit() which is a public slot of QCoreApplication , so there is no difference between QApplication::quit() and QCoreApplication::quit() . As we can

问题 I have an application in java, which is permanently pulled. Execute it as follows: nohup ant> log.txt & The problem is that last indefinitely, the application quits and get a message "Exit 143". 回答1: Exit code 143 corresponds to SIGTERM , which is the signal sent by default when you run kill <pid> . Is it possible that another process or user is killing the application? Without more information it's difficult to suggest anything else. 回答2: I ran into a similar issue while using nodejs, and it

问题 I need to delete some certain files, then user closes program in WPF. So I tried MDSN code from here http://msdn.microsoft.com/en-us/library/system.windows.application.exit.aspx this way: this code located here App.xml.cs public partial class App : Application { void App_Exit(object sender, ExitEventArgs e) { MessageBox.Show("File deleted"); var systemPath = System.Environment.GetFolderPath( Environment.SpecialFolder.CommonApplicationData); var _directoryName1 = Path.Combine(systemPath,

问题 So I've been doing a little bit of reading up on how to exit a while loop by the user pressing the enter key and I've come up with the following: import sys, select, os switch = 1 i = 1 while switch == 1: os.system('cls' if os.name == 'nt' else 'clear') print "I'm doing stuff. Press Enter to stop me!" print i while sys.stdin in select.select([sys.stdin], [], [], 0)[0]: line = raw_input() if not line: print "Finished! =]" switch = 0 else: print "Finished! =]" switch = 0 i = i+1 Is there a way

问题 So I've been doing a little bit of reading up on how to exit a while loop by the user pressing the enter key and I've come up with the following: import sys, select, os switch = 1 i = 1 while switch == 1: os.system('cls' if os.name == 'nt' else 'clear') print "I'm doing stuff. Press Enter to stop me!" print i while sys.stdin in select.select([sys.stdin], [], [], 0)[0]: line = raw_input() if not line: print "Finished! =]" switch = 0 else: print "Finished! =]" switch = 0 i = i+1 Is there a way