Thanks, that seems to work. maybe one more question on this subject: how can i use the callback function to the "createfilehandler" call from within a class? in other words, what would be the signature of the callback function, if I made it a member of a class? The documentation says that the callback is called with the arguments: callback(filehandle, stateMask) but a class member function always has the "self" argument as is first argument. So would the syntax be:
class GUI: def __init__: ..... def filehandlerCallback(self, filehandle, stateMask): .... Jo [EMAIL PROTECTED] wrote: > Compared to your program, I > * Made sure that the slave program actually flushed its stdout buffers > * didn't call read(), which will by default continue reading until > it reaches EOF, not merely read the available data > > #!/usr/bin/env python > import sys, time, Tkinter, itertools, _tkinter, os > > if '-slave' in sys.argv: > for i in itertools.count(): > time.sleep(1) > print "This is a line of output:", i > sys.stdout.flush() > raise SystemExit > > root = Tkinter.Tk() > root.wm_withdraw() > > fh = os.popen('%s -slave' % sys.argv[0]) > > def reader(*args): > line = fh.readline() > if not line: > print "EOF from slave" > raise SystemExit > print "from slave: %r" % line > > _tkinter.createfilehandler(fh, Tkinter.READABLE, reader) > root.mainloop() -- Dr Joachim Schambach The University of Texas at Austin Department of Physics 1 University Station C1600 Austin, Texas 78712-0264, USA Phone: (512) 471-1303; FAX: (814) 295-5111 e-mail: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list