ImportError: No module named 'rospkg' on hydro <SOLVED>

asked 2013-09-30 00:18:29 -0500

tub
76 ●2 ●3 ●6

updated 2016-10-24 09:03:04 -0500

ngrennan
1 ●1 ●1

Hi poeple,

In installed ros-hydro on ubuntu 13.04.

I am trying to get the "morse-simulation": http://www.openrobots.org/wiki/morse/ to work with ros hydro. but I always get an error message when starting my simulation (for example the "tutorial-1-ros.py"):

[helpers.loading] Module not found: Could not import some ROS modules. Check your ROS configuration is ok. Details:
No module named 'rospkg'
[helpers.loading] Could not load the class RosRequestManager in morse.middleware.ros_request_manager
[helpers.loading] Could not create an instance of morse.middleware.ros_request_manager.RosRequestManager

when running "import ros" in python3 i get:

>>> import ros
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/ros/hydro/lib/python2.7/dist-packages/ros/__init__.py", line 41, in <module>
    import roslib
  File "/opt/ros/hydro/lib/python2.7/dist-packages/roslib/__init__.py", line 50, in <module>
    from roslib.launcher import load_manifest
  File "/opt/ros/hydro/lib/python2.7/dist-packages/roslib/launcher.py", line 42, in <module>
    import rospkg
ImportError: No module named 'rospkg'

any idea for a solution of this problem?

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Comments

What if I do not use catkin? Because all along I am using rosbuild. Sorry if making any inconvenient I am a new programmer.

FuerteNewbie ( 2013-10-02 17:09:42 -0500 )edit

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answered 2013-09-30 02:26:09 -0500

tub
76 ●2 ●3 ●6

updated 2014-04-03 21:13:56 -0500

130s

10937 ●203 ●339 ●330 http://www.linkedin.co...

well.. after some more tinkering I found out how to solve this.

I found a solution for the problem: it seems that python3 finds ros, but it does not find specifically the packages rospkg, catkin_pkg and yaml, which are required for morse-simultion to work.

Thus you can just do: after using virtualenv for a virtual python3 installation you can just do:

pip-3.3 install catkin_pkg rospkg yaml

(if yaml installation does not work this way, then just do sudo apt-get install python3-yaml)

After that reconfigure morse with the new python directories (in my case /home/user/bin/python3.3) and everything should work fine.

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2

You should edit this, and place the answer here..

SL Remy ( 2013-10-03 02:48:07 -0500 )edit

I second to @trinighost; separating question and answers makes it so easier for other readers to find what was the effective solution/workaround. I've moved the finding to this answer.

130s ( 2014-04-03 21:15:46 -0500 )edit

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answered 2013-10-03 00:43:55 -0500

severin
240 ●5 ●10 ●14

If you follow the MORSE installation instruction for ROS, you'll see you indeed need to install rospkg for Python 3. Everything should be explained there: if something is missing, please feel free to fill a bug report on MORSE or ask for support on morse-users@laas.fr.