# How to read numbers in CSV files in Python import csv  # creating a nested list of roll numbers,# subjects and marks scored by each roll numbermarks = [    ["RollNo", "Maths", "Python"],    [1000, 80, 85],    [2000, 85, 89],    [3000, 82, 90],    [4000, 83, 98],    [5000, 82, 90]]  # using the open method with 'w' mode# for creating a new csv file 'my_csv' with .csv extensionwith open('my_csv.csv', 'w', newline = '') as file:    writer = csv.writer(file, quoting = csv.QUOTE_NONNUMERIC,                        delimiter = ' ')    writer.writerows(marks)  # opening the 'my_csv' file to read its contentswith open('my_csv.csv', newline = '') as file:        reader = csv.reader(file, quoting = csv.QUOTE_NONNUMERIC,                        delimiter = ' ')          # storing all the rows in an output list    output = []    for row in reader:        output.append(row[:])  for rows in output:    print(rows)