Mac OS X - ImportError: cannot import name POLAR

Hi, I've installed matplotlib 0.71 on Mac OS X 10.3 which

    > completed without errors.

    > when I run python "import matplotlib" is fine, but "import
    > pylab" bombs with "ImportError: cannot import name POLAR"

rm -rf the build directory *and* site-packages/matplotlib and
rebuild/reinstall. This cures the problem 95% of the time. It is
usually caused from some detritus from a previous build or install
that distutils doesn't handle so well. Let mw know...