How should i zero pad 2d data?
out = {}
x = [torch.randn(10, 10), torch.randn(5, 5)]
x = torch.nn.utils.rnn.pack_sequence(x, enforce_sorted=False)
out = torch.nn.utils.rnn.pad_packed_sequence(x, batch_first=True)


RuntimeError: The expanded size of the tensor (10) must match the existing size (5) at non-singleton dimension 1.  Target sizes: [5, 10].  Tensor sizes: [5, 5]