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how to add zero before a number if the number is less than 10 in a dataframe column

原文 2017-04-20 13:18:20 5 1 python/ dataframe

我在数据框中有一列，我想通过将cpro列中的每个值加到小于10的前面加上“ 0”，将其转换为两位数。我用以下方式将其转换为“ 0” '.join（df.loc [df ['cpro'] <10，'cpro']。astype（str）.tolist（））

1 answers

其中x是要填充的字符串：

x.zfill(2)

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