回答編集履歴
1
サンプル修正
test
CHANGED
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@@ -16,7 +16,9 @@
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import pandas as pd
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df = pd.DataFrame({'sales':[5,10,15,20],
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'date':['20200401','20200401','20200402','20200403']})
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ret = df.groupby('date').agg({'sales':'sum'})
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@@ -28,6 +30,10 @@
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#20200401 15
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#20200402 15
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#20200403 20
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```
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