Blender object sensor doesn't exist When spawning an object into a game, I check its hit objects from my master python script, accessing the object spawned in.

For some reason, the "Collision" sensor does not exist in the object, although I can put any controller into the object and that is accessible.

Heavily simplified code to explain what's going on:

c = bge.logic.getCurrentController()
o = c.owner
s = o.scene

sph = s.objects["Sphere"]

col = sph.sensors["Collision"]
# doesn't work

a = sph.controllers["And"]
# works for some reason

col = a.sensors["Collision"]
# also doesn't work


The code worked a few days ago, but has mysteriously stopped working and I am at a loss as to what's going on. Any ideas would be greatly appreciated.

When looking at the object, it may have controllers, but the actuators and sensors both return an empty list.

Edit: I had disabled collision on the object, please do not make the same mistake as me.
So, apparently I need to add an answer to mark it as solved.

Basically, if your object doesn't have collision enabled in physics, it cannot use the collision sensor. Sounds pretty obvious, but it's easy to forget about it.