Write the following user-defined functions in Python: (i) push_trail(N, myStack): Here N and myStack are lists, and myStack represents a stack. The function should push the last 5 elements from the li

Question

Write the following user-defined functions in Python: (i) push_trail(N, myStack): Here N and myStack are lists, and myStack represents a stack. The function should push the last 5 elements from the list N onto the stack myStack.

(ii) pop_one(myStack): The function should pop an element from the stack myStack, and return this element. If the stack is empty, then the function should display the message 'Stack Underflow', and return None.

(iii) display_all(myStack): The function should display all the elements of the stack myStack, without deleting them. If the stack is empty, the function should display the message 'Empty Stack'.

Accepted Answer

def push_trail(N,myStack):
    for i in range(-5,0,1): # Any other correct loop
        myStack.append(N[i])

def pop_one(myStack):
    if not myStack: #OR if myStack==[]: #OR if len(myStack)==0:
        print('Stack Underflow')
    else:
        return myStack.pop()

def display_all(myStack):
    if not myStack: #OR if myStack==[]: #OR if len(myStack)==0:
        print("Empty Stack")
    else:
        for i in myStack[::-1]:
            print(i,end=' ')

Answer