import csv 

data_rows = []
with open("grocery_list.csv", "r") as opened_file:
    reader = csv.reader(opened_file)
    for row in reader:
        data_rows.append(row)

data_rows.append(['Oranges', 3])

with open('new_grocery_list.csv', 'w', newline='') as csvfile:
    writer = csv.writer(csvfile, delimiter=',')
    for row in data_rows:
        writer.writerow(row)