Importing Modules

Modules are Python files containing Python code and definitions. You can use the import statement to bring functionality from a module into your code.

Here's an example of importing the math module and using the sqrt function:

Pythonimport math

result = math.sqrt(25)
print(result)  # Output: 5.0

This allows you to organize your code into separate files and reuse code by importing relevant modules.

Creating and Using Packages

Packages are a way of organizing related modules into a directory hierarchy. They help prevent naming conflicts and provide a modular structure for larger projects.

Here's an example of a simple package structure:

Pythonmypackage/
|-- __init__.py
|-- module1.py
|-- module2.py

You can import modules from a package using dot notation:

Pythonfrom mypackage import module1

module1.function()

Creating packages allows you to organize your code into logical units, making it more maintainable and scalable.