删除 Pandas 中的重复项，但保存其他列 PANDAS 中的值

Question

0 id   description
1 11   pandas
2      is very
3       good

The id is in the 3 lines like: id 在 3 行中，例如：

I want to remove id duplicated but conserve all the description.我想删除重复的 id 但保留所有描述。 I use:我用：

pd.drop_duplicates(subset="id", keep="first")

And that returns me:这让我返回：

0 id description
1 11 pandas

But i want但我想要

0 id description
1 11 pandas is very good.

Answer 1

You can do use groupby + agg :您可以使用groupby + agg ：

df = df.groupby('id').agg(' '.join).reset_index()
print(df)

   id             description
0  11    pandas is very  good