io.UnsupportedOperation: fileno

Cameron Simpson cs at
Fri Nov 14 08:39:22 CET 2014

On 14Nov2014 10:52, Ben Finney <ben+python at> wrote:
>satishmlmlml at writes:
>> fileno() in not supported.
>It is supported, but it is behaving as the documentation describes
>> Is it only in 3.1? What is the workaround?
>Expect an exception when you ask for the file descriptor on a stream
>that does not use a file descriptor.

However, in 3.4.2 it does work (well, on MacOSX). Just as well really, as 
stdin, stdout and stderr do eventually connect to file descriptors...

Cameron Simpson <cs at>

You wouldn't... ...but you KNOW you could.      - Original V65 Commercial

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