def remove_last(self):
if self.is_empty() is True:
raise Exceptions.ListError("Linked List is empty!")
elif self._count == 1:
node_val = self._tail.get_value()
self._head = None
self._tail = None
self._count -= 1
else:
node_val = self._tail.get_value()
self._tail = self._tail.get_prev()
self._tail.set_next(None)
self._count -= 1
return node_val
def peek_last(self):
if self.is_empty() is True:
raise Exceptions.ListError("Linked List is empty!")
else:
node_val = self._tail.get_value()
return node_val