code: def raise_stmt__26(self, raise_loc, type_opt):
          
          type_ = inst = tback = None
          loc = raise_loc
          if type_opt:
              type_, inst_opt = type_opt
              loc = loc.join(type_.loc)
              if inst_opt:
                  _, inst, tback = inst_opt
                  loc = loc.join(inst.loc)
                  if tback:
                      loc = loc.join(tback.loc)
          return ast.Raise(exc=type_, inst=inst, tback=tback, cause=None,
                           keyword_loc=raise_loc, from_loc=None, loc=loc)
docs: (2.6, 2.7) raise_stmt: 'raise' [test [',' test [',' test]]]