回答編集履歴
1
バグ修正
    
        answer	
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         @@ -2,6 +2,6 @@ 
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       2 
2 
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       3 
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            ```python
         
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       4 
4 
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            for line in f:
         
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       5 
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                cols =  
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 5 
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                cols = line.strip().split(',')
         
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       6 
6 
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                outfile.write(f'{cols[0]},{cols[2]},\n')
         
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       7 
7 
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            ```
         
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