import os
import secrets


def get_secret(fn=".secret"):
    if os.path.exists(fn):
        res = read(fn)
    else:
        res = secrets.token_hex(32)
        write(res, fn)
    return res.strip()


def read(fn):
    with open(fn) as f:
        return f.read()

def write(s, fn):
    with open(fn, "w") as f:
        f.write(s)