How could I broadcast 1D uncertain length tensor

I have a 1D torch.tensor, which length is uncertain. How I could broadcast it?
Currently, I propose one way, is it suitable?

def run(rank, world_size):
            if rank == 0:
                n_id = uncertain length 1D tensor
                n_id = torch.zeros(maxlength of n_id, dtype=torch.int64).to(rank)
            dist.broadcast(n_id, src=0)
n_id = n_id[n_id.nonzero()]

if you know the max length of n_id, then you can pad n_id to be the max length with 0 elements