select() on WinXP

[grebekel]

I'm running Python 2.5 on Windows XP. When I try to do this:

import select
select.select([], [], [])

I get this:

[output]
Traceback (most recent call last):
File "C:/Documents and Settings/Grebekel/Desktop/s.py", line 2, in
<module>
select.select([],[],[])
error: (10022, 'An invalid argument was supplied')
[/output]

Is there anything I should be aware of to get select() working under
Windows?

 

[Fredrik Lundh]

I'm running Python 2.5 on Windows XP. When I try to do this:

import select
select.select([], [], [])

I get this:

[output]
Traceback (most recent call last):
File "C:/Documents and Settings/Grebekel/Desktop/s.py", line 2, in
<module>
select.select([],[],[])
error: (10022, 'An invalid argument was supplied')
[/output]

Is there anything I should be aware of to get select() working under
Windows?

like, say, only calling select if you actually have something you want to select on?

(if you want to sleep, use time.sleep())

</F>

 

[grebekel]

I'm using it for sockets, it works on linux but not on Windows. The
actual code is something like (server side):

r, w, e = select.select(self.clients, [], self.clients, 5)

where self.clients is a list of accepted sockets.

 

[Thomas Heller]

I'm using it for sockets, it works on linux but not on Windows. The
actual code is something like (server side):

r, w, e = select.select(self.clients, [], self.clients, 5)

where self.clients is a list of accepted sockets.

The docs for select.select say:

Empty sequences are allowed, but acceptance of three empty sequences is platform-dependent.
(It is known to work on Unix but not on Windows.)

Thomas

 

[grebekel]

I patched the code to:

if self.clients:
r, w, e = select.select(self.clients, [], self.clients, 5)

It works now, thank you Thomas