entropy.py 文件源码

def _maybe_seed(self):
        if not self.seeded:
            try:
                seed = os.urandom(16)
            except:
                try:
                    r = open('/dev/urandom', 'rb', 0)
                    try:
                        seed = r.read(16)
                    finally:
                        r.close()
                except:
                    seed = str(time.time())
            self.seeded = True
            seed = bytearray(seed)
            self.stir(seed, True)