[Python-Dev] Return value from socket.fileno() (original) (raw)

Guido van Rossum guido at python.org
Thu May 24 04:52:09 CEST 2007

On 5/23/07, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:

Alan Kennedy wrote: > I am writing to seek information about the socket.fileno() method, and > opinions on how best to implement it on jython.

I would hope that the new i/o system will make it unnecessary to use fileno() in portable code. It's really a unix-specific thing. > So the question I'm asking is: Does anyone know of existing cpython code > which relies on the return value from socket.fileno() being an integer? > Or code that would break if it were returned a socket instance instead > of an integer? If you only pass it to other things supported on that platform that use filenos, probably not. BTW, you can pass socket objects directly to select() anyway. I'd regard this as the current portable way to use sockets and select. The man page says that this works via the fileno() method, but it doesn't have to be implemented that way -- select() could be taught to recognise socket objects natively.

I want to emphasize this option. Passing the socket to select should be more portable than using fileno().

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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