def listdir(self, dirname, prefix=None):
        return [self._normalize_unicode(x) for x in os.listdir(self._normalize_string(dirname))]
Add bias unit (column or row of 1s) to array at index 0.
dataset/ETHPy150Open memsql/memsql-loader/memsql_loader/vendor/glob2/impl.py/Globber.listdir--crossover with--dataset/ETHPy150Open rasbt/mlxtend/mlxtend/classifier/neuralnet_mlp.py/NeuralNetMLP._add_bias_unit