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Namespace packages in Python allow you to split a single Python package across multiple directories or distributions. This can be beneficial when you want to organize your codebase into logical components that may be developed and distributed independently. In this tutorial, we'll explore how to create a namespace package in Python with a step-by-step guide and code examples.
Before we begin, make sure you have the following installed:
A namespace package is a way to spread a package across several directories. Each directory that contributes to the namespace provides a portion of the package's contents.
Let's start by creating the directory structure for our namespace package. In this example, we'll create two separate packages under the common namespace.
In both my_namespace_package/__init__.py and my_other_namespace_package/__init__.py, include the following code:
This code uses pkg_resources to declare the namespace. It tells Python that this directory should be considered part of a namespace package.
Add some code to the modules within each namespace package:
Create a setup.py file in the root directory (my_namespace_package/) with the following content:
This script uses setuptools to define the package and declares the namespace packages.
Navigate to the root directory in your terminal and run:
This will install the namespace package. Now, you can test it in a Python script or the Python interactive shell:
This should output:
Congratulations! You've successfully created a namespace package in Python. This structure allows you to organize and distribute related modules across multiple directories or packages.
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