from Blender import *

sc=Scene.GetCurrent()
objs = sc.getChildren()
VisLayers = sc.layers

VisCameras = []
for Cam in objs:
	if Cam.getType() == 'Camera':
		if Cam.layers[0] in VisLayers:
			VisCameras.append (Cam.getName())

print '-'*100
print "Visible Cameras:"
print VisCameras