code: def dr_hill_zero_background(x, theta, eta, kappa):
      """dr hill zero background
  
      Parameters
      ----------
      x : int
      theta : float
      eta : float
      kappa : float
  
      Returns
      -------
      float
          (theta* x**eta) / (kappa**eta + x**eta)
      """
      return (theta * x**eta) / (kappa**eta + x**eta)
  
file_path: nni/nni/algorithms/hpo/curvefitting_assessor/curvefunctions.py
imports: import numpy
label_desc: Use image node_id 5 for calling a global function with example usage: dr_hill_zero_background(x, theta, eta, kappa) and returns: unknown