Python AI Program Design

Assignment Nine

Student Scope: Artificial Intelligence major, Intelligent Science and Technology major, Class of 2025

Assignment Submission Deadline: November 19, 2025, 18:00

1. Assignment Content

Product Price Management System

Create a product price management system that uses a dictionary to store product information and implements functions for adding, querying, modifying, deleting, and displaying products.

Program Requirements:

1. 1. Create an empty dictionary to store product information (product name as key, price as value)
2. 2. Add at least 5 products and their prices to the dictionary
3. 3. Implement the following functional functions:

• • <span class="language-python">add_product(products, name, price)</span>: Add new product and price
• • <span class="language-python">query_price(products, name)</span>: Query product price (use get() method for safe access)
• • <span class="language-python">update_price(products, name, new_price)</span>: Update product price
• • <span class="language-python">remove_product(products, name)</span>: Remove discontinued product
• • <span class="language-python">show_all_products(products)</span>: Display all products and prices

4. Write the main program to test all functions

Output Example:

=== Product Price Management System ===

Initial product list:
Apple: 5.50 yuan
Banana: 3.20 yuan
Orange: 6.80 yuan
Grape: 12.00 yuan
Watermelon: 8.50 yuan

--- Add New Product ---
Add product: Strawberry, Price: 15.00 yuan
Add successful

--- Query Product Price ---
Query product: Apple
Price: 5.50 yuan

Query product: Mango
This product does not exist

--- Update Product Price ---
Update product: Banana, New Price: 3.50 yuan
Update successful

--- Remove Discontinued Product ---
Remove product: Watermelon
Remove successful

--- Current All Products ---
Apple: 5.50 yuan
Banana: 3.50 yuan
Orange: 6.80 yuan
Grape: 12.00 yuan
Strawberry: 15.00 yuan

Total number of products: 5 types

2. Submit Assignment

Submit the following content to the teaching assistant’s email in the course group:

Submission Format Requirements:

• • Email Subject: [Assignment Nine] Name-Student ID
• • File Naming: Assignment_Nine_Name_StudentID.docx
• • Screenshot Requirements: Clear and visible, resolution not lower than 1080p

Submission Content:

• • Source code (.py) file
• • Running result screenshot, must include:
• • Complete test results (including all function tests)
• • At least 3 query operations (including both existing and non-existing products)
• • At least 2 price updates and 1 deletion operation
• • Display the final complete product list