import pybullet as p
import time
import pybullet_data

p.connect(p.GUI)
p.setAdditionalSearchPath(pybullet_data.getDataPath())
planeId = p.loadURDF("plane.urdf", useMaximalCoordinates=False)
cubeId = p.loadURDF("cube_collisionfilter.urdf", [0, 0, 3], useMaximalCoordinates=False)

collisionFilterGroup = 0
collisionFilterMask = 0
p.setCollisionFilterGroupMask(cubeId, -1, collisionFilterGroup, collisionFilterMask)

enableCollision = 1
p.setCollisionFilterPair(planeId, cubeId, -1, -1, enableCollision)

p.setRealTimeSimulation(1)
p.setGravity(0, 0, -10)
while (p.isConnected()):
  time.sleep(1. / 240.)
  p.setGravity(0, 0, -10)