Name for button on Astro Pi HAT

[richardhughes]

I haven't been able to find anywhere that states what the name for the centre press of the joystick on the Astro Pi HAT is, in order to use it in code.
I know it will be "if n.button.read(): " for the code to recognise it has been pressed, I just need to know what n is.
Thanks,

[clive]

The direction of the joystick is mapped to the cursor keys and the press to "Enter"

https://www.raspberrypi.org/learning/as ... oystick.md