from Blender import *

sc=Scene.GetCurrent()

context = sc.getRenderingContext()

objs = sc.getChildren()

VisLayers = sc.layers

AllCameras = []
for Cam in objs:
	if Cam.getType() == 'Camera':
		AllCameras.append (Cam.getName())

VisCameras = []
for Cam in AllCameras:
	Layers = Object.Get(Cam).layers[0]
	if Layers in VisLayers:
		VisCameras.append (Cam)


print '-'*100
print "All Cameras in Scene:"
print AllCameras
print ''
print "Visible Cameras:"
print VisCameras