Variable-length keyword arguments (**kwargs) in Python - Mini Project: Build & Apply

Using Variable-Length Keyword Arguments (**kwargs) in Python

📖 Scenario: You are creating a simple program to store information about a car. Different cars have different features, so you want a flexible way to add any number of details about each car.

🎯 Goal: Build a Python function that accepts any number of named details about a car using **kwargs and then prints those details.

📋 What You'll Learn

Create a function called car_info that accepts variable-length keyword arguments using **kwargs.

Inside the function, use a for loop with variables key and value to iterate over kwargs.items().

Print each key and value pair in the format: key: value.

Call the function with at least three named arguments representing car details.

💡 Why This Matters

🌍 Real World

Many programs need to handle flexible data inputs, like user profiles or product details, where the exact information can vary.

💼 Career

Understanding <code>**kwargs</code> is important for writing adaptable Python functions used in web development, data processing, and automation tasks.

1

Define the car_info function with **kwargs

Write a function called car_info that accepts variable-length keyword arguments using **kwargs. Inside the function, write a pass statement for now.

Python

def car_info(**kwargs):
    # Your code here
    pass

Need a hint?

Use def car_info(**kwargs): to define the function and write pass inside to keep it empty for now.

2

Add a for loop to iterate over kwargs.items()

Inside the car_info function, add a for loop with variables key and value to iterate over kwargs.items(). For now, just write pass inside the loop.

Python

def car_info(**kwargs):
    for key, value in kwargs.items():
        # Your code here
        pass

Need a hint?

Use for key, value in kwargs.items(): to loop through all keyword arguments.

3

Print each key and value inside the loop

Replace the pass inside the for loop with a print statement that shows the key and value in the format: key: value using an f-string.

Python

def car_info(**kwargs):
    for key, value in kwargs.items():
        # Your code here
        print(f"{key}: {value}")

Need a hint?

Use print(f"{key}: {value}") to display each detail clearly.

4

Call car_info with three named arguments and print the output

Call the car_info function with these exact named arguments: make='Toyota', model='Corolla', and year=2020. This will print the car details.

Python

def car_info(**kwargs):
    for key, value in kwargs.items():
        print(f"{key}: {value}")

# Your code here
car_info(make='Toyota', model='Corolla', year=2020)

Need a hint?

Call car_info(make='Toyota', model='Corolla', year=2020) exactly to see the details printed.