You have a signal name and an in pin but nothing turning on the in pin unless you have defined the signal name my-radio.one somewhere else to link your radio button to. Also I would not use the . in a signal name like my-radio.one, instead call the signal my-radio-one as it does funny things in the Show Hal config window.
If you go to Machine > Show Hal configuration and open up Pins > pyvcp you will see the HAL names for your radio button.
The following would be a correct HAL line with
net, signal name, out pin, useless graphic, in pin
net my-radio-one pyvcp.my-radio.one => parport.0.pin-08-out
A must read when working with HAL file is
this chapter.
John