[ros-users] handling multiple topics in Python

[Patrick Bouffard]

I was just now in the process of doing that.. The biggest I've seen is
about 3 seconds. They tend to be relatively infrequent but frequent
enough that they will be troublesome for my application. Here's an
example output, this is with autorepeat_rate set to 5 Hz:
http://pastebin.org/152943

I may take a quick try at writing a pure python node for the joystick
using pygame as I'm familiar with that and had no issues with it using
the same hardware. I'll let everyone know how that goes.

Pat

On Thu, Apr 15, 2010 at 4:43 PM, Blaise Gassend <blaise at willowgarage.com> wrote:
> 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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