code: def p_insertx(self,t):
      "expression : kw_insert kw_into NAME opt_paren_namelist kw_values '(' commalist ')' opt_returnx"
      t[0] = InsertX(t[3],t[4],t[7].children,t[9]f p_insertx(self,t):
      "expression : kw_insert kw_into NAME opt_paren_namelist kw_values '(' commalist ')' opt_returnx"
      t[0] = InsertX(t[3],t[4],t[7].children,t[9])
docs: expression : kw_insert kw_into NAME opt_paren_namelist kw_values '(' commalist ')' opt_returnx