[ros-users] $PYTHONPATH in launch files

[Hai Nguyen]

Wait... what part of this env variable is portable?

<env name="PYTHONPATH"
value="/home/advait/svn/robot1/src/libraries:/home/advait/svn/robot1/src/libraries/katana:/home/advait/ros/ros/core/roslib/src:/usr/lib/python2.5/site-packages"
/>

If your user name changes on the remote machine, wouldn't your launch
file stop working?  It seems that the remote machine's $PYTHONPATH
would be more likely to know where all its libraries are than a
.launch file, right?

-hai




On Thu, May 20, 2010 at 11:28 AM, Advait Jain <advait at cc.gatech.edu> wrote:
> I think the goal is to ensure that launch files continue to
> work whether you launch nodes locally or remotely by
> putting the environment variables in the launch files
> and not relying on how the bashrc is set up.
>
>
> On Thu, May 20, 2010 at 11:02 AM, Armin Hornung
> <HornungA at informatik.uni-freiburg.de> wrote:
>>>
>>> You can change environment variables through your launch file:
>>> http://www.ros.org/wiki/roslaunch/XML/env
>>>
>> True, but shouldn't it be the default within a launch environment to
>> keep the system-wide environment variables intact, so that a node
>> behaves identically from the command line and in the launch file?
>>
>> Otherwise, you would have to adjust the launch file in question on each
>> machine to point to exactly the same PYTHONPATH as is already configured
>> on the machine...
>>
>>
>> Cheers,
>> Armin
>>
>> --
>> Armin Hornung                              Albert-Ludwigs-Universität
>> www.informatik.uni-freiburg.de/~hornunga   Dept. of Computer Science
>> HornungA at informatik.uni-freiburg.de        Humanoid Robots Lab
>> Tel.: +49 (0)761-203-8010                  Georges-Köhler-Allee 79
>> Fax : +49 (0)761-203-8007                  D-79110 Freiburg, Germany
>>
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-- 
Hai Nguyen
CS, Robotics