code: def optional_else(self, node, last):
          
          if node.orelse:
              min_first_max_last(node, node.orelse[-1])
              if 'else' in self.operators:
                  position = (node.orelse[0].first_line, node.orelse[0].first_col)
                  _, efirst = self.operators['else'].find_previous(position)
                  if efirst and efirst > last:
                      elast, _ = self.operators[':'].find_previous(position)
                      node.op_pos.append(NodeWithPosition(elast, efirst))
docs: Create op_pos for optional else