如何使用python中另一列的值创建一个新列

Question

I have a large excel sheet, and my data looks like this:

type        price
shoes        10 
clothes      20
shoes        30
clothes      40

I want to move the "30" and "40" value to a new column, and later on I will drop the existing row. I expect it will show up like this:

type        price     new price
shoes        10        30
clothes      20        40

how can I make it in python?

Thankyou

Answer 1

You can try this:

df['newprice'] = df.groupby('type')['price'].transform('max')
df = df.drop_duplicates(subset="type", keep="first")
print(df)

Output:

      type  price  newprice
0    shoes     10        30
1  clothes     20        40