(self, n)
| 530 | return top |
| 531 | |
| 532 | def tokAt(self, n): |
| 533 | tl = self.forward() |
| 534 | if n < 0: |
| 535 | tl = self.backward() |
| 536 | n = -n |
| 537 | for i, t in enumerate(tl): |
| 538 | if i == n: |
| 539 | return t |
| 540 | return None |
| 541 | |
| 542 | def linkAt(self, n): |
| 543 | token = self.tokAt(n) |