def __init__(self, encoder, dataset, path, batch_size=None, topo=False):
        self.encoder = encoder
        self.dataset = dataset
        self.path = path
        self.batch_size = batch_size
        self.topo = topo
Test that the form has no username field. And that the username is
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/scripts/train.py/FeatureDump.__init__--crossover with--dataset/ETHPy150Open bread-and-pepper/django-userena/userena/tests/tests_forms.py/SignupFormOnlyEmailTests.test_signup_form_only_email