python matplotlib framework under macosx?
Optionally you could use the Agg backend which requires no extra installation of anything. Just put backend : Agg into ~/.matplotlib/matplotlibrc
I am getting this error:

/sw/lib/python2.7/site-packages/matplotlib/backends/backend_macosx.py:235:
  UserWarning: Python is not installed as a framework. The MacOSX
  backend may not work correctly if Python is not installed as a
  framework. Please see the Python documentation for more information on
  installing Python as a framework on Mac OS X

I installed python27 using fink and it's using the default matplotlib is using macosx framework.