Data Structures in Python — Question 12

A linear Stack called Directory contains the following information as contacts:

— Pin code of city
— Name of city

Write add(Directory) and delete(Directory) methods in Python to add and remove contacts using append() and pop() operations in Stack.

def add(Directory):
    pincode = int(input("Enter pincode of city: "))
    cityname = input("Enter the city name: ")
    contact = [pincode, cityname]
    Directory.append(contact)

def delete(Directory):
    if (Directory == []):
        print("Directory is empty")
    else:
        print("Deleted contact:", Directory.pop())
        
Directory = []
add(Directory)
add(Directory)
print("Initial Directory Stack:", Directory)

delete(Directory)
print("Directory Stack after deletion:", Directory)

Enter pincode of city: 586789
Enter the city name: Bangalore
Enter pincode of city: 567890
Enter the city name: Mysore
Initial Directory Stack: [[586789, 'Bangalore'], [567890, 'Mysore']]
Deleted contact: [567890, 'Mysore']
Directory Stack after deletion: [[586789, 'Bangalore']]