code: def simulate(self):
          
          min_ = 1 if self._min is None else self._min
          max_ = 10 if self._max is None else self._max
          n = min_ if (min_ >= max_) else random.randint(min_, max_)
          chars = string.ascii_letters + string.digits
          return ''.join(random.choice(chars) for x in range(n))
docs: Returns a randomly constructed string.
  
          Simulate randomly constructs a string with a length between min and
          max. If min is not present, a minimum length of 1 is assumed, if max
          is not present a maximum length of 10 is used.