Importing specific items in Python - Mini Project: Build & Apply

Importing Specific Items in Python

📖 Scenario: You are working on a small program that needs to use only certain functions from Python's built-in math module. Instead of importing the whole module, you want to import just the specific functions you need.

🎯 Goal: Learn how to import specific items from a module and use them in your program.

📋 What You'll Learn

Create a list of numbers

Import specific functions sqrt and pow from the math module

Use the imported functions to calculate square roots and powers

Print the results

💡 Why This Matters

🌍 Real World

Importing only the needed functions from a module helps keep programs efficient and clear, especially when working on larger projects.

💼 Career

Many programming jobs require you to use libraries and modules efficiently. Knowing how to import specific items is a basic but important skill.

1

Create a list of numbers

Create a list called numbers with these exact values: 4, 9, 16, 25.

Python

# Create the list called numbers with the values 4, 9, 16, 25
# Your code here

Need a hint?

Use square brackets [] to create a list and separate numbers with commas.

2

Import specific functions from math module

Write an import statement to import only the sqrt and pow functions from the math module.

Python

numbers = [4, 9, 16, 25]
# Import sqrt and pow from math module
# Your code here

Need a hint?

Use the syntax from module_name import item1, item2.

3

Calculate square roots and powers

Create two lists: roots containing the square roots of each number in numbers using sqrt, and powers containing each number raised to the power of 2 using pow. Use a for loop with variable num to iterate over numbers.

Python

numbers = [4, 9, 16, 25]
from math import sqrt, pow
# Create roots and powers lists using a for loop
# Your code here

Need a hint?

Use append() to add items to a list inside the loop.

4

Print the results

Print the roots list and then print the powers list.

Python

numbers = [4, 9, 16, 25]
from math import sqrt, pow
roots = []
powers = []
for num in numbers:
    roots.append(sqrt(num))
    powers.append(pow(num, 2))
# Print roots and powers lists
# Your code here

Need a hint?

Use two print() statements, one for each list.