docstr: derivative of absolute value
docstr_tok: ["derivative","of","absolute","value"]
code: def dabs(self, x):
      """derivative of absolute value"""
      if x < 0:
          return -1.0
      elif x > 0:
          return 1.0
      else:
          return 0.0
  
imports: import time
  import numpy
  from numpy import sin, cos, pi, exp, sqrt, abs
  from scipy.optimize import rosen
label_desc: Use image node_id 2 for calling the HolderTable obj's underlying member method code with example usage: obj.dabs(x) and returns: unknown, int, int