clear

问题 In Android I have some activities, let\'s say A, B, C. In A, I use this code to open B: Intent intent = new Intent(this, B.class); startActivity(intent); In B, I use this code to open C: Intent intent = new Intent(this, C.class); startActivity(intent); When the user taps a button in C, I want to go back to A and clear the back stack (close both B and C). So when the user use the back button B and C will not show up, I\'ve been trying the following: Intent intent = new Intent(this, A.class);

问题 Like most Python developers, I typically keep a console window open with the Python interpreter running to test commands, dir() stuff, help() stuff , etc. Like any console, after a while the visible backlog of past commands and prints gets to be cluttered, and sometimes confusing when re-running the same command several times. I\'m wondering if, and how, to clear the Python interpreter console. I\'ve heard about doing a system call and either calling cls on Windows or clear on Linux, but I