def setUp(self):
        numpy.random.seed(9 + 5 - 2015)
        self.train_features_mock = [
            numpy.random.randint(0, 256, (10, 3, 32, 32)).astype('uint8')
            for i in range(5)]
        self.train_targets_mock = [
            numpy.random.randint(0, 10, (10,)).astype('uint8')
            for i in range(5)]
        self.test_features_mock = numpy.random.randint(
            0, 256, (10, 3, 32, 32)).astype('uint8')
        self.test_targets_mock = numpy.random.randint(
            0, 10, (10,)).astype('uint8')
        self.tempdir = tempfile.mkdtemp()
        with remember_cwd():
            os.chdir(self.tempdir)
            os.mkdir('cifar-10-batches-py')
            for i, (x, y) in enumerate(zip(self.train_features_mock,
                                           self.train_targets_mock)):
                filename = os.path.join(
                    'cifar-10-batches-py', 'data_batch_{}'.format(i + 1))
                with open(filename, 'wb') as f:
                    cPickle.dump({'data': x, 'labels': y}, f)
            filename = os.path.join('cifar-10-batches-py', 'test_batch')
            with open(filename, 'wb') as f:
                cPickle.dump({'data': self.test_features_mock,
                              'labels': self.test_targets_mock},
                             f)
            with tarfile.open('cifar-10-python.tar.gz', 'w:gz') as tar_file:
                tar_file.add('cifar-10-batches-py')
dataset/ETHPy150Open mila-udem/fuel/tests/test_converters.py/TestCIFAR10.setUp/operator `+` -> `-`