Python Working with Modules

Python modules are separate files containing reusable code, making it easier to organize and reuse code for different applications. A module can define functions, classes, and variables that are accessed through import. Python comes with several modules that are already built-in, but you can also create your own modules to use in your programs.

Syntax

To create a module, we simply write the code that we want to include in the module and save it to a file with a .py extension. To access the module functions, we use the import statement followed by the module name.

# Creating a module
# module.py
def add_numbers(a, b):
    return a + b

# Accessing the module
import module
print(module.add_numbers(2, 3))

Example

Here is an example of how to create and use a Python module. We will create a module with a function that calculates the area of a circle.

# Creating a module
# circle.py
import math

def circle_area(radius):
    return round(math.pi * radius ** 2, 2)

# Accessing the module
import circle
area = circle.circle_area(3)
print("The area of the circle is:", area)

Output

The area of the circle is: 28.27

Explanation

In the example above, we created a module called circle and defined a function called circle_area that calculates the area of a circle. We then imported the math module to access the value of pi and used it in our function.

To use the circle module in our main program, we imported it using the import statement and called the circle_area function with a radius of 3. We then printed the result.

Use

Modules provide a way to organize and reuse code in larger applications. They allow you to break down your code into logical components that can be easily reused in different parts of your application or in other programs. By using modules, you can also avoid naming conflicts and keep your code organized.

Important Points

• A Python module is a separate file containing reusable code
• Modules can define functions, classes, and variables
• To create a module, write the code you want to include and save it to a file with a .py extension
• To access the module functions, use the import statement followed by the module name
• Modules allow you to organize and reuse code in larger applications

Summary

In this tutorial, we discussed Python modules and how to create and use them in your programs. We saw that modules provide a way to organize and reuse code, making it easier to maintain and scale your applications. By using modules, you can break down your code into smaller, more manageable components, and avoid naming conflicts.