Udacity - Rename File

import os
def rename_file():
    file_list=os.listdir(r"C:\Users\Leonardo\Documents\Python\prank")
    #print(file_list)
    saved_path = os.getcwd()
    print("Current working directory: "+saved_path)
    os.chdir(r"C:\Users\Leonardo\Documents\Python\prank")
    for file_name in file_list:
        print("Old file name: "+file_name)
        file_new_name=file_name.translate(None,"0123456789")
        print("New file name: "+file_new_name)
        os.rename(file_name, file_new_name)

rename_file()