code: def appendOps(self, ops, append_to=None):
          
          if isinstance(ops, list):
              self.ops.extend(ops)
          else:
              self.ops.append(ops)
          parent = self.parent
          if parent:
              parent._set_require_reconstruction()
docs: Append op(s) to the transaction builder
  
              :param list ops: One or a list of operations