On 14Nov2014 10:52, Ben Finney <ben+pyt...@benfinney.id.au> wrote:
satishmlm...@gmail.com writes:

fileno() in not supported.

It is supported, but it is behaving as the documentation describes
<URL:https://docs.python.org/3/library/io.html#io.IOBase.fileno>.

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...

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

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