Example of python implementation of /dev/random

dev_random.py

#!/usr/bin/env python

import os
import argparse
import binascii
from sys import argv, stdout


# default values
DEFAULT_ENTROPY = 4096*16


# helper functions
# get list of passed command line arguments
def getopts(argv):
  parser = argparse.ArgumentParser(description=' pseudorandom generator')
  parser.add_argument('--entropy', help="override default entropy of {}".format(DEFAULT_ENTROPY))
  opts = parser.parse_args()
  return opts

class DevRandom:

  def __init__(self, args):
    self.entropy = args.entropy or DEFAULT_ENTROPY

  def get_entropy(self):
    return self.entropy

  def generate_random(self):
    #print ()
    stdout.buffer.write(os.urandom(int(self.entropy)))

if __name__ == '__main__':
   myargs = getopts(argv)
   devRandom = DevRandom(myargs)
   devRandom.generate_random()