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Groups > comp.lang.python > #80745

Re: fileno() not supported in Python 3.1

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On 13Nov2014 15:48, satishmlmlml@gmail.com <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?

The first workaround that suggests itself it to use a more modern Python. I've 
got 3.4.2 here, and it goes:

    Python 3.4.2 (default, Nov  5 2014, 21:19:51)
    [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.54)] on darwin
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import sys
    >>> for stream in (sys.stdin, sys.stdout, sys.stderr):
    ...   print(stream.fileno())
    ...
    0
    1
    2
    >>>

In short, in 3.4.2 it just works.

Cheers,
Cameron Simpson <cs@zip.com.au>

Chris Gascoyne, while struggling to program stuff on Microsoft Windows:
"I thought people said how bad it was just because they didn't like Microsoft."

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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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