Thanks for that code, Morgan -- it works now and makes sense.
Brian - I would prefer to use Python, but I'm a little confused about how
the ROS package file structure works with Python. It was very clear to me
that for C++ source files in the sicktoolbox_wrapper package, I needed to
add certain lines to the CMakeLists.txt file, and put it in a certain
directory. Where do Python files go, and do I need to add them to the
makefile and just re-run 'make', like I do for C++ files? Or is there
something else I need to for Python files?
Best,
Rishi

Rishi Bedi
rbedi100@gmail.com


On Thu, Jul 15, 2010 at 3:46 PM, Brian Gerkey <gerkey@willowgarage.com>wrote:

> On Thu, Jul 15, 2010 at 12:07 PM, Rishi Bedi <rbedi100@gmail.com> wrote:
> > Hi Morgan,
> > Okay -- say I wanted to read in just the range values from sicklms -- how
> > can I just grab those? When I use rostopic echo /scan, the ranges show up
> as
> > a list within brackets - is there a way I can pick out data from a topic
> my
> > node is subscribing to? Sorry if I'm being a bit dense -- I'm not well
> > versed on handling data types in C++.
>
> If you prefer not to think about data types, you can write in Python
> instead.  There's a parallel tutorial for writing Python subscribers:
>
>
> http://www.ros.org/wiki/ROS/Tutorials/WritingPublisherSubscriber%28python%29#rospy_tutorials.2BAC8-Tutorials.2BAC8-WritingPublisherSubscriber.Writing_the_Subscriber_Node
>
>        brian.
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