Patches item #1517586, was opened at 2006-07-05 17:31
Message generated for change (Comment added) made by sonderblade
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=305470&aid=1517586&group_id=5470
Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Library (Lib)
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Brad Doctor (bdoctor)
Assigned to: Nobody/Anonymous (nobody)
Summary: Patch to commands.py to enable callback support
Initial Comment:
This is a patch to commands.py to enable callback
support, which is very useful for long-running
commands. Whenever there is stdout from the process the
callback is fed whatever it got. Example usage:
import commands
cmd = 'top -b -n2'
def fancy(out):
print 'GOT(%s)' % out.strip()
commands.cb = fancy
(s,o) = commands.getstatusoutput(cmd)
print 'OUTPUT (%s)' % o
Please consider adding this. The existing API is not
changed, however as you can see it is simple to use the
callback.
----------------------------------------------------------------------
Comment By: Bj�rn Lindqvist (sonderblade)
Date: 2007-03-08 00:29
Message:
Logged In: YES
user_id=51702
Originator: NO
Your semantic for the cb name seems kind of arbitrary. Why is it called
for each line of the output and only once with all the output. Plus,
iterating through the output line for line can make it much slower than
reading it all at once. Also, the next time you run getstatusoutput(),
maybe even from another module, the callback will still be called. That
could be unexpected. Plus commands is almost deprecated in favour of
subprocess. I recommend rejecting this patch.
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=305470&aid=1517586&group_id=5470
_______________________________________________
Patches mailing list
Patches@python.org
http://mail.python.org/mailman/listinfo/patches
