@property
def previewing(self):
    '\n        Returns ``True`` if the :meth:`start_preview` method has been called,\n        and no :meth:`stop_preview` call has been made yet.\n\n        .. deprecated:: 1.8\n            Test whether :attr:`preview` is ``None`` instead.\n        '
    warnings.warn(PiCameraDeprecated('PiCamera.previewing is deprecated; test PiCamera.preview is not None instead'))
    return isinstance(self._preview, PiPreviewRenderer)
Returns ``True`` if the :meth:`start_preview` method has been called,
and no :meth:`stop_preview` call has been made yet.

.. deprecated:: 1.8
    Test whether :attr:`preview` is ``None`` instead.
@property
def previewing(self):
    '\n        Returns ``True`` if the :meth:`start_preview` method has been called,\n        and no :meth:`stop_preview` call has been made yet.\n\n        .. deprecated:: 1.8\n            Test whether :attr:`preview` is ``None`` instead.\n        '
    warnings.warn(PiCameraDeprecated('PiCamera.previewing is deprecated; test PiCamera.preview is not None instead'))
    return isinstance(self._preview, PiPreviewRenderer)