Select in Python

[Fredrik Lundh]

Dio wrote:

> from sys import stdin
> from select import select
> 
> while 1:
>     (rr, wr, er) = select([stdin], [], [])
>     for fd in rr:
>         print fd
> 
> program block in the first select(), after I type something and "enter
> ", it never block in select() again,why?

if there's data waiting to be read from the stream, select() will tell 
you so every time you ask.

</F>