| 1 | |
| 2 | class Stack: |
| 3 | def __init__(self): |
| 4 | self.stack = [] |
| 5 | def pop(self): |
| 6 | if self.is_empty(): |
| 7 | return None |
| 8 | else: |
| 9 | return self.stack.pop() |
| 10 | def push(self,val): |
| 11 | return self.stack.append(val) |
| 12 | def peak(self): |
| 13 | if self.is_empty(): |
| 14 | return None |
| 15 | else: |
| 16 | return self.stack[-1] |
| 17 | def size(self): |
| 18 | return len(self.stack) |
| 19 | def is_empty(self): |
| 20 | return self.size() == 0 |
no outgoing calls
no test coverage detected