[ros-users] handling multiple topics in Python

Blaise Gassend blaise at willowgarage.com
Thu Apr 15 23:43:38 UTC 2010


Try rostopic hz or rostopic echo to see if you are getting any gaps on
the /joy topic. How big are the gaps you are seeing?

On Thu, 2010-04-15 at 12:12 -0700, Patrick Bouffard wrote:
> Thanks all for the responses, that gives me a few things to try.
> 
> Regarding the joystick: I'm using joy_node from the joy package, and
> setting the autorepeat_rate parameter, so I should be getting a steady
> stream of joy messages, which I mostly do but sometimes there is a
> long gap. My suspicion is that it's my code that is to blame for that
> though.
> 
> I'll hack on this a bit more and report back..
> 
> Cheers,
> Pat
> 
> On Thu, Apr 15, 2010 at 10:59 AM, Blaise Gassend
> <blaise at willowgarage.com> wrote:
> >> Rospy replaces the signal handler for SIGINT.  A running loop in your
> >> main thread will no longer be interrupted with a KeyboardInterrupt.
> >> Instead you should check rospy.is_shutdown() as a condition of your
> >> loop.
> >
> > Also, if you are using threads, SIGINT will only kill one of them even
> > without rospy. You have to make sure that each thread exits after a
> > KeyboardInterrupt (or after rospy.is_shutdown() goes true in the case of
> > rospy).
> >
> >
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> >
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