inserts an element at the front end of the deque
(self, data)
| 108 | self.queue.insert(0, data) |
| 109 | |
| 110 | def insert_front(self, data): |
| 111 | """ |
| 112 | inserts an element at the front end of the deque |
| 113 | """ |
| 114 | if self.is_full(): |
| 115 | return -1 |
| 116 | else: |
| 117 | self.queue.append(data) |
| 118 | |
| 119 | def delete_rear(self): |
| 120 | """ |