code: def visit_Constant(self, node):
          
          nnode = self.dnode(node)
          node.first_line, node.first_col = ast_pos(nnode, self.bytes_pos_to_utf8)
          node.last_line = node.first_line
          node.last_col = node.first_col + len(repr(node.value))
          node.uid = (node.last_line, node.last_col)
docs: PEP 511: Constants are generated by optimizers