ชื่อ รายละเอียด และประเภทข้อมูลของคุณลักษณะที่ผลิตภัณฑ์ใดไม่เคยใช้มีอะไรบ้าง
What are the names, details and data types of the characteristics which are never used by any product?
characteristics_df = pd.DataFrame(columns = ['characteristic_name', 'other_characteristic_details', 'characteristic_data_type', 'characteristic_id']); product_characteristics_df = pd.DataFrame(columns = ['characteristic_id']); characteristics_full_df = pd.DataFrame(columns = ['characteristic_name', 'other_characteristic_details', 'characteristic_data_type'])
characteristics_full_df[~characteristics_full_df['characteristic_name'].isin(characteristics_df.loc[product_characteristics_df['characteristic_id'], 'characteristic_name'])]