code: def __init__(self, *, lambdamax=1 / 2, xi=8 / 5, **kwargs):
      from math import log1p, exp
      import scipy.special as sc
  
      super().__init__(**kwargs)
  
      assert 0 < lambdamax <= 1 + sc.lambertw(-exp(-2))
      assert 1 < xi
  
      self.lambdamax = lambdamax
      self.xi = xi
      self.logxi = log1p(xi - 1)
  
label_desc: Use image node_id 1 to create a new CountableDiscreteBase object from inherited base classes: LowerCSBase with example: obj = CountableDiscreteBase()