(self)
| 546 | self._root = heapq.heappop(PQ) |
| 547 | |
| 548 | def _generate_codes(self): |
| 549 | current_code = "" |
| 550 | self._item2code = {} |
| 551 | self._code2item = {} |
| 552 | self._build_code(self._root, current_code) |
| 553 | |
| 554 | def _build_code(self, root, current_code): |
| 555 | if root is None: |