(self, other)
| 1286 | return self.__class__(self.data + list(other)) |
| 1287 | |
| 1288 | def __radd__(self, other): |
| 1289 | if isinstance(other, UserList): |
| 1290 | return self.__class__(other.data + self.data) |
| 1291 | elif isinstance(other, type(self.data)): |
| 1292 | return self.__class__(other + self.data) |
| 1293 | return self.__class__(list(other) + self.data) |
| 1294 | |
| 1295 | def __iadd__(self, other): |
| 1296 | if isinstance(other, UserList): |