You should also check this with `/usr/bin/python` as well as `python`.
I saw a problem on Mac OS X a while back that was similar due to some
of the ROS scripts using `/usr/bin/python` and not `/usr/bin/env
python`, which caused then to use the wrong version of python. This
gave me a similar type of error - yaml was installed, I could load it
up using the python interpreter, but none of ROS could find it.

Hope that helps.

- Eric

On Tue, Jun 15, 2010 at 10:47 PM, Ken Conley <kwc@willowgarage.com> wrote:
> Alright, it does look like you have a PyYAML install there, question is why
> it's not being found.
>
> One more thing to try :
>
> python --version
> python -c "import yaml; print yaml"
>
>  - Ken
>
> On Tue, Jun 15, 2010 at 7:37 PM, Isao Isaac Saito
> <130s@2000.jukuin.keio.ac.jp> wrote:
>>
>> Ken,
>>
>> thanks. Here is the result after I tried to run installation for PyYAML.
>>
>> <quote>
>> [robot@localhost ~]$ sudo yum install wget cmake PyYAML
>> [sudo] password for robot:
>> Setting up Install Process
>> Package wget-1.12-2.fc11.i586 already installed and latest version
>> Package cmake-2.6.4-3.fc11.i586 already installed and latest version
>> Package PyYAML-3.08-4.fc11.i586 already installed and latest version
>> Nothing to do
>> </quote>
>>
>> Btw, python is ver 2.6.2.
>>
>> Isaac
>> Heracleia lab at UT-Arlington
>>
>>
>> On Tue, Jun 15, 2010 at 9:23 PM, Ken Conley <kwc@willowgarage.com> wrote:
>> > Isaac,
>> >
>> > It appears PyYAML did not install correctly. What happens when you run:
>> >
>> > sudo yum install wget cmake PyYAML
>> >
>> > (I'm not a Fedora expert, but that's the line in the install page)
>> >
>> >  - Ken
>> >
>> > On Tue, Jun 15, 2010 at 7:21 PM, Isao Isaac Saito
>> > <130s@2000.jukuin.keio.ac.jp> wrote:
>> >>
>> >> Hi all,
>> >>
>> >> I am stuck at and getting error message below. I'm assuming this is
>> >> resulting in pythonpath setting but I'm not sure since I'm new to it
>> >> yet. I appreciate if anyone gives me an idea.
>> >>
>> >> - Phenomenon
>> >> <quote>
>> >> % ~/rosinstall ~/ros
>> >> http://ros.org/rosinstalls/boxturtle_base.rosinstall
>> >> Traceback (most recent call last):
>> >>  File "/home/robot/rosinstall", line 25, in <module>
>> >>    import yaml # 10Jun15/Isao; rosnstall still stuck here
>> >> ImportError: No module named yaml
>> >> </quote>
>> >>
>> >> - Environement
>> >> Redhat Linux version 2.6.29.4
>> >> gcc version 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC)
>> >> Type of ROS: I'm referring to "Fedora 11 Installation Instructions"
>> >> (http://www.ros.org/wiki/ROS/Installation/Fedora)
>> >> # Using Redhat 2.6 is required the robot
>> >>
>> >> - Workaround tried (all of these didn't have effect)
>> >> W-1. Copy /usr/lib/python2.6/site-packages/yaml/cyaml.py* to
>> >> %HOME_PYTHON%/ . Modify rosinstall to "import cyaml"
>> >> W-2. Copy /usr/share/doc/PyYAML-3.08/examples/pygments-lexer/yaml.py
>> >> to %HOME_PYTHON%/
>> >>
>> >> - Result of "locate yaml"
>> >> https://docs.google.com/View?id=dfcq779r_271f5bt6gff
>> >>
>> >> Best regards,
>> >> Isaac
>> >> _______________________________________________
>> >> ros-users mailing list
>> >> ros-users@code.ros.org
>> >> https://code.ros.org/mailman/listinfo/ros-users
>> >
>> >
>> > _______________________________________________
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>> > ros-users@code.ros.org
>> > https://code.ros.org/mailman/listinfo/ros-users
>> >
>> >
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