No module named "yaml"
I installed ROS on Ubuntu 11.10 using the complete desktop install from ros.org. However, when I try to run roscore, I get the following error:
`Traceback (most recent call last):
File "/opt/ros/electric/ros/bin/roscore", line 34, in <module>
from ros import roslaunch
File "/opt/ros/electric/ros/core/roslib/src/ros/__init__.py", line 57, in __getattr__
return __import__(name)
File "/opt/ros/electric/stacks/ros_comm/tools/roslaunch/src/roslaunch/__init__.py", line 43, in <module>
import roslaunch.param_dump
File "/opt/ros/electric/stacks/ros_comm/tools/roslaunch/src/roslaunch/param_dump.py", line 43, in <module>
import yaml
ImportError: No module named yaml`
I found someone with the same problem here: http://answers.ros.org/question/12862/nao-error-no-module-named-yaml
I also tried to get the yaml package using, "sudo apt-get install build-essential python-yaml cmake subversion wget python-setuptools mercurial git-core", but terminal then says that python-yaml is already updated. How can I get this yaml module working properly?
Can you just do
python -c 'import yaml; print "success"'
?