revised stack

src/rbm/rbm.py

@@ -9,14 +9,16 @@ if __name__ == "__main__":
 
 	for n, dim in enumerate(dims):
 		layer = Layer(f"Layer-{n}", dim, params)
-		stack.layer_add(layer)
+		stack.append(layer)
 
 	stack.init(std=0.1)
 	stack.state_save()
 
-	try:
-		stack.layer_add(Layer(f"Layer-{0}", (9,9), params))
-	except StackException as e:
-		print(f"Exception raised: [{e}] -> success!")
+	lay0 = stack.layers[0]
+	lay1 = stack.from_name("Layer-1")
+	lay2 = stack.from_index(2)
+	stack.remove(lay2)
+	stack.remove(lay1)
+	stack.remove(lay0)
 
 	print("Test: [passed]")