[Numpy-discussion] np.vstack vs. np.stack

Hello, I have a question and hope that you can help me. The doc for vstack mentions that "this function continues to be supported for backward compatibility, but you should prefer np.concatenate or np.stack." Using vstack was convenient because "the arrays must have the same shape along all but the first axis." So it was possible to stack an array (3,) and (2, 3) to a (3, 3) array without using e.g. atleast_2d on the (3,) array. Is there a possibility to mimic that behavior with np.concatenate or np.stack? Joe