回答編集履歴
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追記
test
CHANGED
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@@ -11,3 +11,23 @@
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"""
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```
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【追記】ミリ秒を切り捨てる
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```Python
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df = pd.DataFrame({'dt':['2019,3,30,22,53,31,964000','2019,3,30,22,53,31,964000']})
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datelist = df['dt'].values.tolist()
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datelist = [','.join(i.split(',')[:-1]) for i in datelist]
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df['dt'] = datelist
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df['dt'] = pd.to_datetime(df['dt'], format='%Y,%m,%d,%H,%M,%S')
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```
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