* Peter Otten <__pete...@web.de> [2014-10-19 10:05]: > George R Goffe wrote: > > > When you run a python program, it appears that stdin, stdout, and stderr > > are opened automatically. > > > > I've been trying to find out how you tell if there's data in stdin (like > > when you pipe data to a python program) rather than in a named input file. > > It seems like most/all the Unix/Linux commands are able to figure this > > out. Do you know how Python programs do this or might do this? > > There is also the fileinput module.
I use fileinput all the time. "This iterates over the lines of all files listed in sys.argv[1:], defaulting to sys.stdin if the list is empty. If a filename is '-', it is also replaced by sys.stdin. To specify an alternative list of filenames, pass it as the first argument to input(). A single file name is also allowed." It gives a fairly clean way to just "do the Right Thing" whether you are feeding files, or reading from stdin. -- David Rock da...@graniteweb.com _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
