📦 Opening the Toolbox
Imagine needing a specific tool, like a calculator or a random number generator. Instead of building it from scratch every time, Python lets you borrow pre-written code.
These collections of pre-written code are called modules. We use the import keyword to bring their functionality into our own programs. This is a core concept for efficient programming!
🛠️ Why Import? Think Toolboxes!
Importing is like grabbing the right tool for the job.
You Need Functionality
e.g., Calculate a square root or pick a random item.
Import a Module
Use import math or import random to get the toolbox.
Use its Tools
Call functions like math.sqrt() or random.randint().
Importing brings powerful, pre-tested tools directly into your code.
🧩 Benefits of Using Modules
Modules make programming smarter, not harder.
Reusability
Don't reinvent the wheel! Use code that others have written and tested. Saves time and reduces errors.
PC: ReusabilityAbstraction
You can use a module's functions without needing to understand every detail of how they work internally. Focus on *what* it does, not *how*.
PC: AbstractionOrganization
Modules group related functions together, keeping code clean, manageable, and easier to understand.
Click on the cards above to reveal more!
⚙️ Modules in Action
Let's see how to import and use the `math` and `random` modules.
import math # Bring in the math module
number = 16
result = math.sqrt(number) # Use its sqrt function
print(f"The square root of {number} is {result}")
# Output: The square root of 16 is 4.0import random # Bring in the random module
dice_roll = random.randint(1, 6) # Get random integer 1-6
print(f"You rolled a: {dice_roll}")
# Output: You rolled a: [some number between 1 and 6]
First, we use the
importThe keyword to load a module.
statement followed by the module name (e.g., math, random).
To use a function from an imported module, we type the
module nameThe name of the imported module (e.g., math).,
a dot ., and then the
function nameThe specific tool/action from the module (e.g., sqrt).
with parentheses ().
For example, math.sqrt(16) calls the `sqrt` function inside the `math` module.
Similarly, random.randint(1, 6) calls the `randint` function from the `random` module.
🧠 Quick Check!
Module 26 Theory Complete!
You've learned how to import and use modules – a key skill for writing efficient Python code! This relates strongly to Reusability and Abstraction.
Ready to practice? Head to the Practice Zone or challenge yourself with the Advanced Practice.