io.UnsupportedOperation: fileno

[Ben Finney]

satishmlmlml at 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.

-- 
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Ben Finney