I have always disliked the idea of multiple pythons competing with the system one. 

A problem with MacPorts is that all python packages depend on MacPorts' python, ie they don't play nice with the system Python. 

I have had good luck recently installing c-turtle on a new system using easy_install instead. This required running "easy_install PyYAML", and commenting out some of the macports lines in rosdep.yaml. 

Just putting it out there as an alternative approach. 

--Nick



On Aug 29, 2010, at 12:57 PM, Eric Perko <wisesage5001@gmail.com> wrote:

Billy,

If you run python from a terminal and type 'import yaml' does it work properly or do you get the same error?

I've seen a similar error with multiple Python versions installed and whichever one rosinstall was using was not the one that yaml had been installed to.

- Eric

On Sun, Aug 29, 2010 at 3:47 PM, Pablo Hevia-Koch <pablo@hevia-koch.cl> wrote:
Chek this out, might help you:

http://py-yaml.darwinports.com/

:)
Keep Creating,

Pablo




On 29 August 2010 15:45, Billy Okal <b.okal@jacobs-university.de> wrote:
Dear all,

I am experiencing the following problem with Cturtle installation on Snow leopard. I have followed the standard osx guide on the wiki and installed py25-yaml correctly, but still I get this,

Traceback (most recent call last):
  File "/usr/local/bin/rosinstall", line 5, in <module>
    pkg_resources.run_script('rosinstall==0.5.6', 'rosinstall')
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/pkg_resources.py", line 442, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/pkg_resources.py", line 1167, in run_script
    exec script_code in namespace, namespace
  File "/Library/Python/2.6/site-packages/rosinstall-0.5.6-py2.6.egg/EGG-INFO/scripts/rosinstall", line 23, in <module>
    
ImportError: No module named yaml

Has anybody seen this, what what could be the remedy for it?


Billy Okal.
"sure vi is user friendly, its just particular about who to be friends with"

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