code: def generate_key(key_length=64):
      
      if hasattr(random, 'SystemRandom'):
          logging.info('Generating a secure random key using SystemRandom.')
          choice = random.SystemRandom().choice
      else:
          msg = "WARNING: SystemRandom not present. Generating a random "\
                "key using random.choice (NOT CRYPTOGRAPHICALLY SECURE)."
          logging.warning(msg)
          choice = random.choice
      return ''.join(map(lambda x: choice(string.digits + string.ascii_letters),
                     range(key_length)))
docs: Secret key generator.
  
      The quality of randomness depends on operating system support,
      see http://docs.python.org/library/random.html#random.SystemRandom.