buffered

问题 In case of buffered stream it said in a book that it wait until the buffer is full to write back to the monitor. For example: cout << "hi"; What do they mean by "the buffer is full". cerr << "hi"; It is said in my book that everything sent to cerr is written to the standard error device immediately, what does it mean? char *ch; cin>> ch; // I typed "hello world"; In this example ch will be assigned to "hello" and "world" will be ignored does it mean that it still in the buffer and it will

问题 Is output buffering enabled by default in Python\'s interpreter for sys.stdout ? If the answer is positive, what are all the ways to disable it? Suggestions so far: Use the -u command line switch Wrap sys.stdout in an object that flushes after every write Set PYTHONUNBUFFERED env var sys.stdout = os.fdopen(sys.stdout.fileno(), \'w\', 0) Is there any other way to set some global flag in sys / sys.stdout programmatically during execution? 回答1: From Magnus Lycka answer on a mailing list: You can