How to rename a CSV file by adding MODIFIED in the filename?

[Python_User]

I am sorry for the late response. Here is what I got so far:

import os
from pathlib import Path
import pandas as pd

df = pd.read_csv('Book1.csv')

df["NEW COLUMN"] = ""


df.to_csv('MODIFIED_NAME_OF_THE_ORIGIN_FILE.csv', index = False)