| 1 | class Stack: |
| 2 | def __init__(self): |
| 3 | self.items = [] |
| 4 | |
| 5 | def push(self, item): |
| 6 | self.items.append(item) |
| 7 | |
| 8 | def pop(self): |
| 9 | return self.items.pop() |
| 10 | |
| 11 | def is_empty(self): |
| 12 | return self.items == [] |
| 13 | |
| 14 | def peek(self): |
| 15 | return self.items[-1] |
| 16 | |
| 17 | def display(self): |
| 18 | return self.items |
| 19 | |
| 20 | |
| 21 | def is_same(p1, p2): |