713408083 by Unknown

Author:Unknown
Language: eng
Format: epub

Creating and Organizing Packages

As your Python program grows larger, it becomes increasingly important to organize your code into separate modules and packages. A package is a collection of modules that can be imported and used together.

To create a package, you need to create a directory with an `__init__.py` file inside it. The `__init__.py` file serves as a marker, indicating to Python that the directory should be treated as a package. It can also be used to initialize the package and define code that should be executed when the package is imported.

Here's an example of a package structure:

mypackage/

__init__.py

module1.py

module2.py

subpackage/

__init__.py

module3.py

In this example, `mypackage` is the package, and it contains two modules (`module1.py` and `module2.py`) and a subpackage called `subpackage`. The `subpackage` also has an `__init__.py` file and a `module3.py` file.

To import a module from a package, you need to use dot notation, separating the package name, subpackage name (if applicable), and the module name with periods.

import mypackage.module1

import mypackage.subpackage.module3

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