Notepad++ install Python Script plugin with Plugin Manager
In order to be able to run a lot of interesting scripts (see Notepad++ randomize, sort lines random), written in Python language in Notepad++, you need to install the Python Script plugin.
You can either download and install it manually, or install it automatically with the Plugin Manager, that you can find in menu Plugins => Plugin Manager => Show Plugin Manager
Open the Plugin Manager, look for the entry Python Script in the list, and select Install.
You might be prompted to update your Notepad++ or the Plugin Manager, please do so before proceeding.
Once the Plugin Manager is updated, and after having restarted your Notepad++, try again installing the plugin.
You can now access in the Plugins => Python Script menu.
The scripts accessible will be limited at first – you need to install required scripts in the folder (most likely under Program Files => Notepad++ => plugins => PythonScript => scripts)
Python Script plugin official site