Answers for "stack adt in python"

stack data structure python

#using doubly linked list
from collections import deque
myStack = deque()

myStack.append('a')
myStack.append('b')
myStack.append('c')

myStack
deque(['a', 'b', 'c'])

myStack.pop()
'c'
myStack.pop()
'b'
myStack.pop()
'a'

myStack.pop()

#Traceback (most recent call last):
 #File "<console>", line 1, in <module>
##IndexError: pop from an empty deque

def dft(self, array): stack = Stack() visited = set() stack.append(self) while len(stack) > 0 and while len(visited) >= 0: current = stack.pop() array.append(current) visited.add(current) return array

def dft(self, array):
    stack = Stack()
    visited = set()
    stack.append(self)
    while len(stack) > 0 and while len(visited) >= 0:
        current = stack.pop()
        array.append(current)
        visited.add(current)
    return array