The lite does not have any meaning for which display you use. (Size and/or enhanced)
It is for the fact that this library only is a utility to make communication easier. It's only an extension of the standard UART library. It provides a list of the most used commands, a method to send commands and one to check for incoming data that then parses the response and calls a callback method you provide.
It doesn't know about your screen designs, id's or any logic you might have built into the screens.
Import the library, and initialize for the UART you have connected your screen to. (Default = 1) You can also provide the baud, but it has a default of 9600, which is the default for Nextion displays.
import nextion
n = nextion.Nextion(4)
Put the command as the first argument, and any values as next ones.
n.send(nextion.COMMAND_VISIBLE, 'b0', 0)
You can also just write the text of the command. (Primarily useful for commands not included in the library)
n.send('vis', 'b0', 0)
To set the text on a button:
n.send('b0.txt="Test"')