Question

Write and test the following function:

def array_to_stack(stack, source):
    """
    -------------------------------------------------------
    Pushes contents of source onto stack. At finish, source is empty.
    Last value in source is at bottom of stack,
    first value in source is on top of stack.
    Use: array_to_stack(stack, source)
    -------------------------------------------------------
    Parameters:
        stack - a Stack object (Stack)
        source - a Python list (list)
    Returns:
        None
    -------------------------------------------------------
    """

Answer 1

Ans:-

Code:

def array_to_stack(stack,source):
print(source)#print initial list source
for i in range(len(source)-1,-1,-1):#use for loop for(start,stop,step) start from last index in reverse step pf -1
stack.append(source.pop(i)) #pop the element from source in reverse order and push into stack
print(stack) #print final value of stack
print(source) #print final list
  
source=[1,3,5,6,8]
stack=[]
array_to_stack(stack,source)

Output for testing:-

main.py 1 def array_to_stack(stack, source: 2 print(source) #print initial list source for i in range (len (source) -1,-1,-1):#use for Loop for(start, stop, step) start from last index in reverse step pf stack.append(source.pop(i)) #pop the element from source in reverse order and push into stack! print(stack) #print final value of stack print(source) #print final list Ovo AW 8 source=[1,3,5,6,8] 9 stack=[] 10 array_to_stack(stack, source) input [1, 3, 5, 6, 8] [8, 6, 5, 3, 1] ... Program finished with exit code o

The first row of output is the initial list

The second row of output is final stack

Third row of output corresponds to the final list

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