'Returns a list of faces detected.  This includes identities for
famous people.
:param images_file: An image file or zip file of image files to
analyze.
:param images_url: The url for an image file or zip file of images to
analyze.
:return:'

def detect_faces(self, images_file=None, images_url=None):

    params = {'version': self.version}
    return self._image_call('/v3/detect_faces', images_file, images_url, params)
