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Visit the official Python website: Go to https://www.python.org/ in your web browser.

Download Python: Click on the "Downloads" tab, and you'll see the latest version of Python displayed at the top. You can download Python 3.x (where "x" represents the latest version number) as it is the most recent stable release.

Choose the installer: Scroll down to the bottom of the page, and you'll find two versions of Python installers available for download: one for Windows and another for macOS/Linux. Select the appropriate installer based on your operating system.

Start the installer: Once the installer is downloaded, locate the file and double-click it to start the installation process.

Customize the installation (optional): In the installer window, you can choose to customize the installation by clicking on the "Customize installation" button. This allows you to modify the installation directory, add optional features, or adjust advanced settings. If you're new to Python, the default settings should be sufficient.

Install Python: Click on the "Install Now" button to begin the installation process. The installer will copy the necessary files and set up Python on your computer.

Add Python to PATH (Windows only): During the installation process, you might encounter a checkbox asking if you want to "Add Python to PATH." Make sure to check this box as it allows you to run Python from any command prompt or terminal window.

Verify the installation: Once the installation is complete, open the command prompt (Windows) or terminal (macOS/Linux) and type "python" or "python3" (depending on your system) followed by the "Enter" key. If Python is installed correctly, you should see the Python interpreter prompt.

That's it! You have successfully installed Python on your computer. You can now start writing and executing Python programs.