added exception if mode is set in kwargs
added exception if mode is set in kwargs

yuxiang-zhou/menpo,mozata/menpo,grigorisg9gr/menpo,patricksnape/menpo,grigorisg9gr/menpo,mozata/menpo,patricksnape/menpo,menpo/menpo,grigorisg9gr/menpo,yuxiang-zhou/menpo,yuxiang-zhou/menpo,mozata/menpo,mozata/menpo,patricksnape/menpo,menpo/menpo,menpo/menpo