def pop(self):
"""Pop an item from the stack
Args:
self (StackArray): The Stack
Returns:
(int): int popped from stack
"""
if self.top is None:
raise IndexError('')
self.top, item = linked_list.pop(self.top, self.num_items - 1)
self.num_items -= 1
return item
def pop(self):
"""method that removes the item at the top of the stack
Args:
No args
Returns:
item (any type) : the item (data) that was removed
Raises:
IndexError : when the stack is empty
"""
if self.is_empty():
raise IndexError
self.top, item = llist.pop(self.top, 0)
self.num_items -= 1
return item
def test_linked_list7(self):
lst = None
for i in range(3):
lst = linked_list.insert(lst, i, i)
self.assertEqual(linked_list.pop(lst, 0), (Node(1, Node(2, None)), 0))
self.assertEqual(linked_list.pop(lst, 2), (Node(0, Node(1, None)), 2))
def pop(self):
"""Write signature and purpose
"""
self.top, val = linked_list.pop(self.top, self.num_items - 1)
self.num_items = self.num_items - 1
return val
def test_pop(self):
self.assertEqual(pop(Node(1, Node(2, Node(3, None))), 2),
(Node(1, Node(2, None)), 3))
self.assertRaises(IndexError, pop, None, 7)
self.assertEqual(pop(Node(1, Node(2, Node(3, None))), 0),
(Node(2, Node(3, None)), 1))