回答編集履歴
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answer
CHANGED
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@@ -3,4 +3,7 @@
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dfa.loc[dfa['Date']==s1, ‘SuperBowl’] = 1
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dfa.loc[dfa['Date']==s2, ‘SuperBowl’] = 1
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dfa.loc[dfa['Date']==s3, ‘SuperBowl’] = 1
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```
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```
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条件式はisinで一気に評価できます。
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https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.isin.html
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