On 05/12/2012 16:34, Antoine Pitrou wrote:
http://docs.python.org/3/library/subprocess.html#subprocess.Popen.poll
The doc looks clear to me. poll() returns the returncode attribute which
is described thusly:
"A None value indicates that the process hasn’t terminated yet."
Therefore, I don't understand the confusion.
Because lazy/busy people don't bother reading the links underneath docs...
poll() is explicitly
non-blocking, and it is silly to expect it to return a process return
code when the process hasn't returned yet (!). The correct answer is
to use the wait() method (or communicate()), which is described two
lines below poll().
I agree, however, I also:
- don't see any harm in the change I propose
- do see a slight improvement for the comprehending impaired ;-)
May I suggest your colleagues didn't read the doc at all?
One of them quoted the docs at me at proof that his code must be correct ;-)
Chris
--
Simplistix - Content Management, Batch Processing & Python Consulting
- http://www.simplistix.co.uk
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