def register_layers(package, type):
prefix = package.__name__ + "."
for importer, modname, ispkg in pkgutil.iter_modules(
package.__path__, prefix):
module = __import__(modname, fromlist="dummy")
for name, obj in inspect.getmembers(module):
if inspect.isclass(obj):
if issubclass(obj, Layer) and obj != Layer:
Layer.register_layer(obj, type)
