Phyton code to get text remaining at the same size all the time to be readable I want to get the text with a fix dimensions although there is near or far from the camera. 

At the moment I have a text facing the camera all the time with this code: 

"from bge import logic

scene = logic.getCurrentScene()

text = scene.objects["Text"]

camera = scene.cameras[0]

text.worldOrientation = camera.worldOrientation"

What I need is that the text remain at the same size all the time to be readable (not too small neither too big).

thanks
Place the text in an overlay scene. This way the distance to the camera (in that scene) is constant and the object size appears to be always the same.