class_docstr: The pseudo-Huber penalty.
class_docstr_tok: ["The","pseudo-Huber","penalty","."]
code: def deriv(self, params):
      v = np.sqrt(1 + (params / self.dlt) ** 2)
      return params * self.weights * self.alpha / v
  
imports: import numpy
label_desc: Use image node_id 3 for calling the PseudoHuber obj's underlying member method code with example usage: obj.deriv(params) and returns: unknown