(self, index=None)
| 415 | self._sorted = False |
| 416 | |
| 417 | def peek(self, index=None): |
| 418 | if not self._sorted: |
| 419 | self.sort() |
| 420 | if index is None: |
| 421 | index = len(self.contents) - 1 |
| 422 | return self.contents[index] |
| 423 | |
| 424 | def pop(self): |
| 425 | if not self._sorted: |