def crop(self, box=None): """ Returns a rectangular region from this image. The box is a 4-tuple defining the left, upper, right, and lower pixel coordinate. See :ref:`coordinate-system`. Note: Prior to Pillow 3.4.0, this was a lazy operation. :param box: The crop rectangle, as a (left, upper, right, lower)-tuple. :rtype: :py:class:`~PIL.Image.Image` :returns: An :py:class:`~PIL.Image.Image` object. """ if box is None: return self.copy() if box[2] < box[0]: msg = "Coordinate 'right' is less than 'left'" raise ValueError(msg) elif box[3] < box[1]: msg = "Coordinate 'lower' is less than 'upper'" raise ValueError(msg) self.load() return self._new(self._crop(self.im, box))

根据你提供的代码，错误发生在Image.py文件的crop方法中。具体来说，如果传入的box参数中，右边的坐标值小于左边的坐标值，就会引发ValueError异常并抛出"Coordinate 'right' is less than 'left'"的错误消息。

你需要检查传入crop方法的box参数，确保右边的坐标值大于左边的坐标值。这个错误通常意味着传入的坐标范围不正确，导致无法进行裁剪操作。