tornado_cookie_secret_generator.py

#!/usr/bin/env python

import base64
import os

# Get a number that is random enough for cryptographic purposes.
print base64.b64encode(os.urandom(50)).decode('ascii')

The string created by this code should be stored in a config file or database for continued use by your application.

• os.urandom
• Myths about /dev/urandom

Here's a live version http://ideone.com/wxuU7K