ImportError: No module named roslib
I am having a problem running python files. Here are the 1st-3rd lines of the py file:
#!/usr/bin/env python
import roslib; roslib.load_manifest('irobot_mudd')
import rospy
Whenever I run $ sudo python ml.py (ml.py being the python file in question)- as well as any other py file importing roslib, I get the error message:
Traceback (most recent call last):
File "ml.py", line 2, in <module>
import roslib; roslib.load_manifest('irobot_mudd')
ImportError: No module named roslib
If I run
$ python ml.py
I get the following back:
Traceback (most recent call last):
File "ml.py", line 4, in <module>
import cv_bridge
ImportError: No module named cv_bridge
My setup.sh file is as follows:
export ROS_ROOT=/opt/ros/electric/ros
export PATH=${ROS_ROOT}/bin:${PATH}
export PYTHONPATH=${ROS_ROOT}/core/roslib/src:${PYTHONPATH}
export ROS_PACKAGE_PATH=/opt/ros/electric/stacks
if [ ! "$ROS_MASTER_URI" ] ; then export ROS_MASTER_URI=http://localhost:11311 ; fi
this is what my python path looks like:
echo $PYTHONPATH
/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:/opt/ros/electric/ros/core/roslib/src:
Here is the result of ls /opt/ros/electric/ros/core/roslib/src:
package.cpp ros roslib
And the result of ls /opt/ros/electric/ros/core/roslib/src/roslib/*.py is:
/opt/ros/electric/ros/core/roslib/src/roslib/exceptions.py /opt/ros/electric/ros/core/roslib/src/roslib/params.py
/opt/ros/electric/ros/core/roslib/src/roslib/genpy.py /opt/ros/electric/ros/core/roslib/src/roslib/resources.py
/opt/ros/electric/ros/core/roslib/src/roslib/gentools.py /opt/ros/electric/ros/core/roslib/src/roslib/rosenv.py
/opt/ros/electric/ros/core/roslib/src/roslib/__init__.py /opt/ros/electric/ros/core/roslib/src/roslib/roslogging.py
/opt/ros/electric/ros/core/roslib/src/roslib/launcher.py /opt/ros/electric/ros/core/roslib/src/roslib/rospack.py
/opt/ros/electric/ros/core/roslib/src/roslib/manifestlib.py /opt/ros/electric/ros/core/roslib/src/roslib/rostime.py
/opt/ros/electric/ros/core/roslib/src/roslib/manifest.py /opt/ros/electric/ros/core/roslib/src/roslib/scriptutil.py
/opt/ros/electric/ros/core/roslib/src/roslib/message.py /opt/ros/electric/ros/core/roslib/src/roslib/srvs.py
/opt/ros/electric/ros/core/roslib/src/roslib/msgs.py /opt/ros/electric/ros/core/roslib/src/roslib/stack_manifest.py
/opt/ros/electric/ros/core/roslib/src/roslib/names.py /opt/ros/electric/ros/core/roslib/src ...
I have tried sourcing /opt/ros/electric/setup.sh While this command works, I still get the error
Please provide the complete backtrace. Maybe it contains something important.
Backtrace of what exactly?
The python backtrace that shows you the import error. Please always copy-paste the exact error you are getting. See http://www.ros.org/wiki/Support
Sure. Here it is: >>Traceback (most recent call last): >>File "ros_workspace/irobot_mudd/ml.py", line 2, in <module> >>import roslib; roslib.load_manifest('irobot_mudd') >>ImportError: No module named roslib
Sure. Here it is:
Could you please edit your original question and add it? That makes it way easier to read :)
Also, please execute
echo $PYTHONPATHafter you got the error, in the same terminal. Just to be sure your program uses the right path... :)Thanks Lorenz. I have added these changes. I hope they are helpful.
The pythonpath should just be: /opt/ros/electric/ros/core/roslib/src, but having many of those does not hurt. Can you also execute ls /opt/ros/electric/ros/core/roslib/src and post the results in your question, please?
Sure. I have done so KruseT
This does not make much sense. Also post ls /opt/ros/electric/ros/core/roslib/src/roslib/*.py
Can you please not use cites but code blocks for code? Just copy-paste text, mark it and press Ctrl-k. That way, we don't lose any line breaks that might be important. Can you also post the output of the following entered in a python shell: import sys; sys.path
The path /opt/ros/electric/ros/core/roslib/src is missing from your sys.path. It should be in there if it was in your PYTHONPATH, unless what you do changes the PYTHONPAT or sys.path before you call import roslib.
I called as you said I should, and the roslib directory exists. I still get the same error.
Can you tell us more about what you do to get the error? Do you call a shell script, or a python script? What are the first line of the python script? What is the result of : $ cd /opt/ros/electric/ros/core/roslib/src;python -c 'import roslib; print "success"'
I have added this information.