Help with csv

[perrud]

I'm learning progamming, so i start to learn about CSV, but when I tryed to make something with that i noobed.
Basically I make a progam who you can creat a csv file with name, price and importance of a product. But when i try to print a list after that fail.
Code

# Vinicius Perrud

import csv

#def listcreator for creat lists
def listCreat():
    nomedalista = input('Insira um nome para a lista de compras: ')
    p = str(input('Peça: '))
    p = p.split(' ')
    d = str(input('Custo : '))
    d = d.split(' ')
    i = str(input('Importancia: '))
    i = i.split(' ')
    csvfile = open((nomedalista + '.csv'), 'w')
    filewriter = csv.writer(csvfile, delimiter=',', quotechar='|', quoting=csv.QUOTE_MINIMAL)
    filewriter.writerow(['Item ', 'Custo ', 'Importância '])
    # filewriter.writerow([p, d, i])
    a = len(p) - 1
    while a >= 0:
        filewriter.writerow([p[a], d[a], i[a]])
        a = a - 1


#def printList for print a list
def printList():
    nome = str(input('Nome da lista: '))
    nome = nome + '.csv'
    myFile = open(nome, 'r')
    reader = csv.reader(myFile)
    for row in reader:
        reader[row] = 'banana'
        print(reader)

listCreat()
printList()

Error

Error:
Traceback (most recent call last):
  File "/home/perrud/Documentos/Python/CSV Teste/ListManager.py", line 35, in <module>
    printList()
  File "/home/perrud/Documentos/Python/CSV Teste/ListManager.py", line 31, in printList
    reader[row] = 'banana'
TypeError: '_csv.reader' object does not support item assignment

Someone know what is wrong??

[DeaD_EyE]

You can't write to a reader. The assignment in line 31 is not supported.
If you just want to print out, change the lines 31,32 to:

        print(row)