Wrong number of Layers in parts/space when tuning number of Layers

[loublock]

According to issue #204 the number of layers could be tuned by a for-loop

model = ...
num_layers = <result of randint>
for _ in range(num_layers):
        model.add(Dense({{choice([np.power(2,5),np.power(2,9),np.power(2,11)])}}))
        model.add(Activation({{choice(['tanh','relu', 'sigmoid'])}}))
        model.add(Dropout({{uniform(0, 1)}}))

But the layers added in the for-loop are missing when you look in the space object. This is because hyperparameter_names(model_string) is not able to find the string parts in mode_string.