如何从熊猫的给定数据框列中获取唯一对

Question

sample data from dataframe

对

(8, 8), (8, 8), (8, 8), (8, 8), (8, 8)
(6, 7), (7, 7), (7, 7), (7, 6), (6, 7)
(2, 12), (12, 3), (3, 4), (4, 12), (12, 12)

    ```
    
        new_col = []
            for e in content.Pairs:
            new_col.append(list(dict.fromkeys(e)))
            content['Unique'] = new_col
    
    ```

期望的输出是像这样的“配对”列中的唯一对

(8, 8),(6, 7),(7, 6),(7, 7),(2, 12) so on

尝试上面的代码时，我得到的是这个结果

唯一

['8', '']
['6', '7', '']
['2', '12', '3', '4', '']