appfx-cosmosdb

Create a simple inventory management system using Python that leverages the 'appfx-cosmosdb' package for data storage and retrieval. This application will help users manage their inventory by adding new items, updating item details, deleting items, and listing all items. Here’s how you can structure your project:

1. **Setup**: Start by installing the necessary packages including 'appfx-cosmosdb'. Ensure you have an Azure Cosmos DB account set up with both SQL and MongoDB APIs enabled.
2. **Database Initialization**: Use 'appfx-cosmosdb' to connect to your Cosmos DB instance. Create collections for storing different types of inventory items if necessary.
3. **User Interface**: Develop a command-line interface (CLI) for users to interact with the inventory management system. Include options to add, update, delete, and list items.
4. **Adding Items**: Implement functionality to add new items to the inventory. Each item should include fields such as ID, name, description, quantity, and price.
5. **Updating Items**: Allow users to modify existing items in the inventory. Users should be able to change any field except the ID.
6. **Deleting Items**: Provide a way for users to remove items from the inventory. Ensure that once deleted, items cannot be recovered through the application.
7. **Listing Items**: Create a feature that lists all items currently in the inventory. Optionally, allow sorting by name, quantity, or price.
8. **Error Handling**: Implement robust error handling to ensure the application gracefully handles incorrect inputs or database issues.
9. **Testing**: Write tests to validate the functionality of each component of the application.

This project aims to demonstrate the capabilities of the 'appfx-cosmosdb' package while building a practical, real-world application.