Stack using List in DSA using Python

Program 1

# Stack implementation using list

stack=[]   # Empty stack
def push():
  n=int(input("Enter an element for push"))
  if(len(stack)==0):
       stack.append(n)
  else:
      stack.insert(0,n)     

def pop():
    if(len(stack)==0):
        print("Stack is empty")
    else:
        print("Poped element: ",stack[0])
        del stack[0]

def display():
    if(len(stack)==0):
        print("Stack is empty")
    else:
        print("Stack elements: ")    
        for element in stack:
            print(element)

while(1):
    print("--------------------Stack Menu----------------------")
    print(" 1.Push\n 2.Pop \n 3.Display \n 4.Exit")
    print("-------------------------------------------------------")
    choice=int(input("Enter your choice"))
    if(choice==1):
        push()
    elif(choice==2):    
        pop()
    elif(choice==3):    
        display()    
    elif(choice==4):
        break
    else:
        print("Invalid choice")