a3a8bee5b9
This applies only to non-brewed python: The user will still have to set his PYTHONPATH in order to import python modules in an external python interpreter. However, a warning will be displayed, now. Further, during the build, the PYTHONPATH will be set to Homebrew's global site-packages so that software (like PyQt and others) that need to `import sipconfig` in python can find the brewed sip and its python module.