Creating custom modules in Python - Try It Yourself

Creating Custom Modules

📖 Scenario: You are building a small program that uses a custom module to organize your code better. This is like having a toolbox where you keep your tools separate but easy to find.

🎯 Goal: Create a custom module with a function, then import and use that function in your main program.

📋 What You'll Learn

Create a Python module file named mymodule.py with a function inside

Define a function called greet inside mymodule.py that returns a greeting string

Import the greet function from mymodule in the main program

Call the greet function and print its result

💡 Why This Matters

🌍 Real World

In real projects, custom modules help organize code into separate files, making it easier to maintain and reuse parts of your program.

💼 Career

Knowing how to create and use modules is essential for software development jobs, as it improves code structure and teamwork.

1

Create the custom module file

Create a file named mymodule.py and inside it, define a function called greet that returns the string 'Hello from mymodule!'.

Python

# Define the greet function inside mymodule.py
# Your code here

Need a hint?

Remember, a function starts with def and returns a value with return.

2

Import the greet function

In a new Python file (main program), write the line to import the greet function from the mymodule module.

Python

# Import the greet function from mymodule
# Your code here

Need a hint?

Use the syntax from module_name import function_name.

3

Call the greet function

Call the imported greet function and store its result in a variable named message.

Python

from mymodule import greet

# Call greet and save the result in message
# Your code here

Need a hint?

Call the function by writing its name followed by parentheses.

4

Print the greeting message

Print the variable message to display the greeting from the custom module.

Python

from mymodule import greet

message = greet()

# Print the message variable
# Your code here

Need a hint?

Use the print() function to show the message on the screen.