Building a Menu-Driven List Management System in Python

This article demonstrates how to create a simple menu-driven program in Python to perform CRUD operations on a list.
It helps beginners understand functions, conditionals, loops, and basic data handling through a practical example.

Code

data = []

# def insert(list1, value):
#     list1.append(value)
#     return "Value added successfully!"

def insert(data):
    user_input = input("Enter values (space or comma separated): ")

    items = user_input.replace(",", " ").split()

    for item in items:
        data.append(int(item))

    return "Values added successfully!"


def display(list1):
    return "No records" if not list1 else list1

def update(list1, old_value, new_value):
    if old_value in list1:
        index = list1.index(old_value)
        list1[index] = new_value
        return "Item updated successfully"
    return "Item not found"

def searching(list1, value):
    if value in list1:
        return list1.index(value) + 1
    return -1

def delete_item(list1, value):
    if value in list1:
        list1.remove(value)
        return "Item deleted successfully"
    return "Item not found"

def sort_list(list1):
    list1.sort()
    return list1

def reverse_list(list1):
    list1.reverse()
    return list1

while True:
    print("\n----- Management System -----")
    print("1. Add Value")
    print("2. Display Values")
    print("3. Update Value")
    print("4. Search Value")
    print("5. Delete Value")
    print("6. Sort List")
    print("7. Reverse List")
    print("0. Exit")

    choice = int(input("Enter your choice: "))

    match choice:
        case 1:
            # val = int(input("Enter value: "))
            print(insert(data))

        case 2:
            print(display(data))

        case 3:
            old = int(input("Enter old value: "))
            new = int(input("Enter new value: "))
            print(update(data, old, new))

        case 4:
            val = int(input("Enter value to search: "))
            pos = searching(data, val)
            print(f"Found at position {pos}" if pos != -1 else "Item not found")

        case 5:
            val = int(input("Enter value to delete: "))
            print(delete_item(data, val))

        case 6:
            print("Sorted List:", sort_list(data))

        case 7:
            print("Reversed List:", reverse_list(data))

        case 0:
            print("You are exited")
            break

        case _:
            print("Wrong choice")