回答編集履歴
1
修正
    
        answer	
    CHANGED
    
    | @@ -8,4 +8,5 @@ | |
| 8 8 |  | 
| 9 9 | 
             
            with pd.ExcelWriter('ret.xlsx', datetime_format='YYYY年MM月DD日') as w:
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| 10 10 | 
             
                df.to_excel(w, index=False)
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| 11 | 
            -
            ```
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| 11 | 
            +
            ```
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            +
            
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