How would i make the computer assign a name to the automaticly that can be recalled later in python

My objective is to make the computer assign a name to the user file automatically but that can also be recalled later.

import random
r = random.Random()#i want this too be a random name that the computer can recall later

while True:
    with open(r, "w") as f:
        f.write(input("Write to file here -"))
    if 1==1:
        True
    else:
        break