code: def ln(X, Y):
      Y[:] = (
          (X - 1)
          - (X - 1) ** 2 / 2
          + (X - 1) ** 3 / 3
          - (X - 1) ** 4 / 4
          + (X - 1) ** 5 / 5
          - (X - 1) ** 6 / 6
          + (X - 1) ** 7 / 7
          - (X - 1) ** 8 / 8
          + (X - 1) ** 9 / 9
      )
      return Y
  
label_desc: Use image node_id 1 for calling a global function with example usage: ln(X, Y) and returns: Y