Dear all,

IN order to finish the tutorials of PR2 open a door, I do it like this.
http://www.ros.org/wiki/pr2_simulator/Tutorials/PR2OpenDoor

But when I finished the setp of installation,and change the environment variable.

Something goes wrong.

yubin@yubin-laptop:~$ echo "source /opt/ros/cturtle/setup.sh" >> ~/.bashrc
yubin@yubin-laptop:~$ . ~/.bashrc
yubin@yubin-laptop:~$ roscd ros
yubin@yubin-laptop:/opt/ros/cturtle/ros$ roscore
Traceback (most recent call last):
File "/opt/ros/cturtle/ros/bin/roscore", line 34, in <module>
    from ros import roslaunch
File "/opt/ros/boxturtle/ros/core/roslib/src/ros/__init__.py", line 63, in __getattr__
    return __import__(name)
File "/opt/ros/cturtle/ros/tools/roslaunch/src/roslaunch/__init__.py", line 43, in <module>
    from roslaunch.config import ROSLaunchConfig
File "/opt/ros/cturtle/ros/tools/roslaunch/src/roslaunch/config.py", line 49, in <module>
    import roslaunch.loader
File "/opt/ros/cturtle/ros/tools/roslaunch/src/roslaunch/loader.py", line 45, in <module>
    from roslib.names import make_global_ns, ns_join, PRIV_NAME, load_mappings, is_legal_name, canonicalize_name
ImportError: cannot import name canonicalize_name

Thanks a lot.
Bin