[Python-Dev] PEP 389: argparse - new command line parsing module

Antoine Pitrou solipsis at pitrou.net
Thu Oct 8 00:24:08 CEST 2009

Hrvoje Niksic <hrvoje.niksic <at> avl.com> writes:
> Of course; simply use the >&- pseudo-redirection, which has been a 
> standard sh feature (later inherited by ksh and bash, but not csh) for 
> ~30 years.  The error message is amusing, too:
> $ python -c 'print "foo"' >&-
> close failed in file object destructor:
> Error in sys.excepthook:
> Original exception was:

Python 3 complains at startup and is a bit more explicit:

$ ./python -c '1' >&-
Fatal Python error: Py_Initialize: can't initialize sys standard streams
OSError: [Errno 9] Bad file descriptor

Of course, if it is stderr that you explicitly close, you lose all reporting:

$ ./python -c '1' 2>&-



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