tgrandje
2020-11-29 22:14:16
最简单的方法是首先删除所有重复项；你可以使用以下方法执行此操作：
uniques = df[['OfferID', 'SideID', 'CategoryID']].drop_duplicates(keep="first")
之后，你可以执行以下操作（请注意，你的随机值不是唯一的）：
uniques['NPS'] = [random.randint(0, 100) for x in uniques.index]
进而 ：
df = df.merge(uniques, on=['OfferID', 'SideID', 'CategoryID'], how='left')
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