17 def eval_expr(symint: Union[int, torch.SymInt]) -> Optional[int]:  argument
19     Evaluate a symint to int. Returns None if symint's symoblic expr
22     if isinstance(symint, int):
23         return symint
24     node = symint.node
34 def eval_upper_bound(maybe_symint: Union[int, torch.SymInt]) -> int:  argument
36     Evaluate a symint to its uppper bound value. Returns None if symint's symoblic expr's
69 def eval_shape(shape: Iterable[Union[int, torch.SymInt]]):  # pyre-ignore[3]  argument
80 def eval_shape_upper_bound(shape: Iterable[Union[int, torch.SymInt]]) -> List[int]:  argument
88     shape: Iterable[Union[int, torch.SymInt]]  argument
92         if not isinstance(sz, torch.SymInt):