def not_supported_on_windows(msg=None):
    'A little helper to be invoked to consistently fail whenever functionality is\n    not supported (yet) on Windows\n    '
    if on_windows:
        raise NotImplementedError(('This functionality is not yet implemented for Windows OS' + ((': %s' % msg) if msg else '')))
A little helper to be invoked to consistently fail whenever functionality is
not supported (yet) on Windows
def not_supported_on_windows(msg=None):
    'A little helper to be invoked to consistently fail whenever functionality is\n    not supported (yet) on Windows\n    '
    if on_windows:
        raise NotImplementedError(('This functionality is not yet implemented for Windows OS' + ((': %s' % msg) if msg else )))