回答編集履歴
1
answer
CHANGED
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@@ -3,4 +3,6 @@
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3
3
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```python
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4
4
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for date, sub_df in df.groupby('Date'):
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5
5
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sub_df.to_csv(f'{date}.csv')
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6
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-
```
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6
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+
```
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7
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+
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8
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+
参考：[Group by: split-apply-combine # Iterating through groups](https://pandas.pydata.org/pandas-docs/stable/user_guide/groupby.html#iterating-through-groups)
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