파이썬 csv질문드립니다.

import csv
 
csvfile = open("test.csv","w+")
 
try:
    writer = csv.writer(csvfile)
    writer.writerow(('number','number plus 2', 'number times 2'))
    for i in range(10):
        writer.writerow( (i,i+2,i+2))
finally:
    csvfile.close()

number number plus 2 number times2
 
0 2 0
 
1 3 2
 
2 4 4
....