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rosrun rqt_graph rqt_graph (Import error: no module named rospkg)(Is this is related to anaconda?)

asked 2016-09-07 08:27:42 -0500

NEO gravatar image

updated 2016-09-07 11:45:21 -0500

Problem started when i executed rosrun as mentioned in question, then i installed rospkg using command

sudo apt-get install python-rospkg

and rospkg got installed in /usr/lib/python2.7/dist-packages/rospkg , but after that import error still showing. I am using anaconda too on my laptop and python2.7 is default for anaconda. One interesting point i got here that i have installed rospkg in python2.7 but when i am importing rospkg in python3.4, it is working.

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Please add anaconda to the title and tags since the problem is very likely related to that.

Dirk Thomas gravatar image Dirk Thomas  ( 2016-09-07 08:54:43 -0500 )edit

What are the permissions on /usr/lib/python2.7/dist-packages/rospkg ?

SL Remy gravatar image SL Remy  ( 2016-09-08 12:40:00 -0500 )edit

default for all user

NEO gravatar image NEO  ( 2016-09-08 21:50:59 -0500 )edit

I've had a case where I was not able to read some of the directories in dist-packages so when I did an import of that module, python was unable to do so. This is the reason why I was asking about the permissions.

SL Remy gravatar image SL Remy  ( 2016-09-09 08:25:56 -0500 )edit

I also notice that on my machine, python2 and python2.7 somehow do different things.... So python -c "import rospkg" works, but python2.7 -c "import rospkg" does not... (just in case this isn't weird enough!)

SL Remy gravatar image SL Remy  ( 2016-09-09 08:28:46 -0500 )edit

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answered 2016-12-06 14:02:15 -0500

This error occurs because only Python packages in /opt are added to PYTHONPATH environment. I'm reading about python-rospkg and I found that this package is installed in /usr. You only have to type "export PYTHONPATH=$PYTHONPATH:/usr/lib/python2.7/dist-packages" and this line will be add in your .bashrc file. In my case, that was the solution that fix the error.

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It works, thanks a lot!

adayoegi gravatar image adayoegi  ( 2018-02-14 20:24:22 -0500 )edit

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Asked: 2016-09-07 08:27:42 -0500

Seen: 1,486 times

Last updated: Sep 07 '16