tensor, probably:
@torch.jit.script 
def fn(l : List[int]): 
     return torch.tensor(l) 
fn.graph                                                                                                                                                                                                  

gives
graph(%l.1 : int[]):
  %4 : bool = prim::Constant[value=0]()
  %2 : None = prim::Constant()
  %5 : Tensor = aten::tensor(%l.1, %2, %2, %4)
  return (%5)

Best regards
Thomas