Kevin Walzer wrote:
I'm also skeptical of the value of subprocess, at least as a complete
replacement for os.popen (the original version): it currently provides
no way to set a 'non-blocking' mode. I make heavy use of this kind of
call in my code:
self.file = os.popen('do stuff here'), 'r', os.O_NONBLOCK)
Eh, what? The third argument to os.popen is the buffer size to use for
the file object, while O_NONBLOCK is an integer flag that you can use
with os.open (no "p" in there), fcntl, etc. to work with fifos and
special devices.
(O_NONBLOCK happens to be 2048 on at least some Unix machines, so
chances are that your snippet simply opens the stream with a 2k buffer
instead of the 4k default.)
To control the buffer size for subprocess, use the bufsize argument to
Popen.
</F>
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