model = train_mnist_victim() 

def query_mnist(input_data):     
    return get_target(model, input_data) 

emnist_train, emnist_test = get_emnist_data() 
attack = ModelExtractionAttack(query_mnist, 100,              
         (1, 28, 28, 1), 10,             
         (1, 3, 28, 28), "copycat",              
         ImagenetTransferLearning,              
         1000, emnist_train, emnist_test)