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Groups > comp.lang.python > #80854

Re: fileno() not supported in Python 3.1

References <bcc9a923-4a68-45b2-9854-a6f750e71ee7@googlegroups.com>
Date 2014-11-15 21:25 -0800
Subject Re: fileno() not supported in Python 3.1
From Dan Stromberg <drsalists@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.15868.1416115554.18130.python-list@python.org> (permalink)

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On Thu, Nov 13, 2014 at 3:48 PM,  <satishmlmlml@gmail.com> wrote:
> import sys
> for stream in (sys.stdin, sys.stdout, sys.stderr):
>            print(stream.fileno())
>
>
> io.UnsupportedOperation: fileno
>
> Is there a workaround?
> --
> https://mail.python.org/mailman/listinfo/python-list

Works for me, although it's a little different in Jython:
$ pythons --command 'import sys; print(sys.stdin.fileno())'
/usr/local/cpython-2.4/bin/python good 0
/usr/local/cpython-2.5/bin/python good 0
/usr/local/cpython-2.6/bin/python good 0
/usr/local/cpython-2.7/bin/python good 0
/usr/local/cpython-3.0/bin/python good 0
/usr/local/cpython-3.1/bin/python good 0
/usr/local/cpython-3.2/bin/python good 0
/usr/local/cpython-3.3/bin/python good 0
/usr/local/cpython-3.4/bin/python good 0
/usr/local/jython-2.7b3/bin/jython good org.python.core.io.StreamIO@170ed6ab
/usr/local/pypy-2.3.1/bin/pypy good 0
/usr/local/pypy-2.4.0/bin/pypy good 0
/usr/local/pypy3-2.3.1/bin/pypy good 0
/usr/local/pypy3-2.4.0/bin/pypy good 0

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Thread

fileno() not supported in Python 3.1 satishmlmlml@gmail.com - 2014-11-13 15:48 -0800
  Re: fileno() not supported in Python 3.1 Ben Finney <ben+python@benfinney.id.au> - 2014-11-14 10:57 +1100
    Re: fileno() not supported in Python 3.1 satishmlmlml@gmail.com - 2014-11-13 16:08 -0800
      Re: fileno() not supported in Python 3.1 Ben Finney <ben+python@benfinney.id.au> - 2014-11-14 13:52 +1100
  Re: fileno() not supported in Python 3.1 Cameron Simpson <cs@zip.com.au> - 2014-11-14 18:36 +1100
  Re: fileno() not supported in Python 3.1 Nobody <nobody@nowhere.invalid> - 2014-11-14 13:59 +0000
    Re: fileno() not supported in Python 3.1 Joel Goldstick <joel.goldstick@gmail.com> - 2014-11-14 09:09 -0500
  Re: fileno() not supported in Python 3.1 Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-14 09:51 -0700
    Re: fileno() not supported in Python 3.1 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-15 22:23 +1100
  Re: fileno() not supported in Python 3.1 Dan Stromberg <drsalists@gmail.com> - 2014-11-15 21:25 -0800
  Re: fileno() not supported in Python 3.1 Chris Angelico <rosuav@gmail.com> - 2014-11-16 16:29 +1100

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