如何在 python 中转换 CSV？

Question

I have this csv:

 id1, var1, value1_id1,
 id1,var2, value2_id1,
 id2,var1, value1_id2,
 id2,var2, value2_id2,

How i can transform my csv to:

 id, var1, var2,
 id1, value1_id1, value2_id1,
 id2, value1_id2, value2_id2,

Answer 1

Following @de1

You should use pandas :

import pandas as pd
df = pd.read_csv("data.csv", header=None) #import csv

df.columns = ['ID', 'VAR', 'VALUE','extra'] #defining the column header
data = df[['ID', 'VAR', 'VALUE']] #defining a new database without the extra column

data.pivot(index='ID', columns='VAR')