'Returns a path to the package data housed at \'path\' under this
module.Path can be a path to a file, or to a directory.
This function will raise ValueError if the path does not exist.'

def path(self, path):

    fullpath = os.path.normpath(os.path.join(self.dirname, path))
    if (not os.path.exists(fullpath)):
        raise ValueError(('dataPath:    %s    does    not    exist.' % fullpath))
    return fullpath
