"Tim Peters" <[EMAIL PROTECTED]> writes: > [moving this from comp.lang.python to zope-dev; it really belongs on a > Zope list, although schemes to change what pythonw does probably belong > on python-dev]
[I'm currently reading python-list via the gmane nntp interface, I don't know whether there really is a gmane.comp.web.zope.devel newsgroup] > [Thomas Heller] >> It has been reported that writing to the original sys.stdout (and >> maybe also sys.stderr) sooner or later raises an IOError when running >> pythonw.exe, unless these are redirected. Could this be the problem? > > It could, although I have no idea what WinXP does (and don't have access to > XP). Here's a Python program to try: > > """ > import sys > if 1: # edit to 1 for stdout, 0 for stderr > console = sys.stdout > else: > console = sys.stderr > > import traceback > tb = file('tb.txt', 'w') > > try: > i = 0 > while True: > i += 1 > console.write('.') > except: > print >> tb, "Died when trying to write byte", i > traceback.print_exc(file=tb) > tb.close() > """ > > Under Win98SE, and regardless of whether it writes to stdout or stderr, it > dies when run under pythonw, and tb.txt contains this after: > > Died when trying to write byte 4097 > Traceback (most recent call last): > File "wr.py", line 14, in ? > console.write('.') > IOError: [Errno 9] Bad file descriptor I get exactly the same, on Win XP Pro, both for sys.stdout and sys.stderr. > The point of pythonw.exe is that no console is created or inherited, and the > default stdin, stdout and stderr provided by MS C in that case are unusable > (although the output flavors can appear to be usable until some secret MS > limit is exceeded -- at least under Win98SE). Since it seems XP shows the same behaviour than win98SE, has the behaviour of Python changed? Were IOErrors ignored on sys.stdout or sys.stderr in earlier versions? IIRC, /F first proposed that pythonw.exe should create a console to have a place to show tracebacks. Sounds like a good idea to me. Thomas _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )