code: def weld_variance(array, weld_type):
      
      weld_obj_mean = weld_mean(array, weld_type)
  
      obj_id, weld_obj = create_weld_object(array)
      weld_obj_mean_id = get_weld_obj_id(weld_obj, weld_obj_mean)
  
      weld_template = _weld_variance_code
  
      weld_obj.weld_code = weld_template.format(array=obj_id,
                                                type=weld_type,
                                                mean=weld_obj_mean_id)
  
      return weld_obj
docs: Returns the variance of the array.
  
      Parameters
      ----------
      array : numpy.ndarray or WeldObject
          Input array.
      weld_type : WeldType
          Type of each element in the input array.
  
      Returns
      -------
      WeldObject
          Representation of this computation.