code: def grad_ARDSE(ls, x1, x2=None):
      r2 = dist2(ls, x1, x2)
      r = np.sqrt(r2)
      return (
          -0.5
          * np.exp(-0.5 * r2)[:, :, np.newaxis]
          * grad_dist2(ls, x1, x2)
      )
  
file_path: auptimizer/src/aup/Proposer/spearmint/gp.py
imports: import numpy
  import scipy.linalg
  import scipy.optimize
  import scipy.io
label_desc: Use image node_id 5 for calling a global function with example usage: grad_ARDSE(ls, x1, x2) and returns: unknown