Non-exhaustive file reads

[Fredrik Tolf]

I just got shocked to find out the hard way that the read() method on
Python's file objects will, very much unlike the C read() function, read
until the given size is reached, which is quite a problem for me when
selecting a couple of pipes and wanting to just read the available data
from them.

The only hint I can find for avoiding this behavior is from
file.read.__doc__, which says that it doesn't do that in non-blocking
mode, but nowhere can I find any information about how to enable
non-blocking mode in Python.

Can anyone provide me with any information on how to accomplish this?

Regards,
Fredrik Tolf

[Paul Rubin]

Fredrik Tolf <fr*****@dolda2000.comwrites:

mode, but nowhere can I find any information about how to enable
non-blocking mode in Python.

Can anyone provide me with any information on how to accomplish this?

In Linux you'd use fcntl. Some other discussion can be found on the
web:

http://www.google.com/search?q=python+non-blocking+mode

[Fredrik Tolf]

On Sat, 2006-12-02 at 20:00 -0800, Paul Rubin wrote:

Fredrik Tolf <fr*****@dolda2000.comwrites:

mode, but nowhere can I find any information about how to enable
non-blocking mode in Python.

Can anyone provide me with any information on how to accomplish this?

In Linux you'd use fcntl. Some other discussion can be found on the
web:

I was looking for os.fcntl() without finding it, but now that you
reassured me, I found the fcntl module instead.

However, I also found os.read() in the process, which might be a better
alternative (since I can just use it normally like in C without setting
extra fd flags or anything).

Thanks!

Fredrik Tolf