code: def pow4(x, alpha, a, b, c):
      """pow4
  
      Parameters
      ----------
      x : int
      alpha : float
      a : float
      b : float
      c : float
  
      Returns
      -------
      float
          c - (a*x+b)**-alpha
      """
      return c - (a * x + b) ** -alpha
  
file_path: nni/nni/algorithms/hpo/curvefitting_assessor/curvefunctions.py
imports: import numpy
label_desc: Use image node_id 7 for calling a global function with example usage: pow4(x, alpha, a, b, c) and returns: unknown