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Python for Excel - 第 110 頁 - Google 圖書結果

... 1 In [77]: df1.join(df2, how="left") Out[77]: 0 A B 1 2 3 4 5 6 C D NaN NaN ... how="right") Out[78]: D 1 A B C 3.0 4.0 10 NaN NaN 30 20 3 40 In [79]: ...

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