def unixpath(self, path: str) -> str:
pathlist = path.split("/")
stack = Stack()
for p in pathlist:
if p != "." and p != "..":
stack.push(p)
if p == "..":
stack.pop()
return "/".join(stack.toList())
def test_push(self):
s = Stack()
s.push(3)
self.assertEqual(s.toList(), [3])