Can read() be non-blocking?

[Lawrence D'Oliveiro]

In message <mailman.3600.1226012406.3487.python-list at python.org>, Thomas
Christensen wrote:

>       r = select.select([proc.stdout.fileno()], [], [], 5)[0]
>       if r:
>           # NOTE: This will block since it reads until EOF
>           data = proc.stdout.read()

No, it will read what data is available.