docs: def dev_random_entropy(numbytes, fallback_to_urandom=True):
      """ Reads random bytes from the /dev/random entropy pool.
  
          NOTE: /dev/random is a blocking pseudorandom number generator.
          If the entropy pool runs out, this function will block until more
          environmental noise is gathered.
          If entropy re-use is unnacceptable use this over "dev_urandom_entropy".
  
          If "fallback_to_urandom" is set, this function will fallback to
          /dev/urandom on operating systems without /dev/random.
      """
      if os.name == 'nt' and fallback_to_urandom:
          return dev_urandom_entropy(numbytes)
      return open("/dev/random", "rb").read(numbytes)