获取 pandas 中唯一用户的最后一行的特定列值

Question

I have a table like this

user	friend	food
One	Two	apple
Three	Four	hello
Three	Two.	hey.

My desired output is this

user	friend
One	Two
Three	Two.

Thanks.

Answer 1

You can use groupby_last :

out = df.groupby('user')['friend'].last().reset_index()

Output:

    user friend
0    One    Two
1  Three   Two.