code: def mse_loss(x: torch.Tensor) -> torch.Tensor:
      if x.numel() == 0:
          return torch.tensor([0.0], device=x.device)
      return F.mse_loss(
          x, torch.tensor(1.0, device=x.device).expand_as(x)
      )
  
imports: import typing
  import flashy
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 8 for calling a global function with example usage: mse_loss(x) and returns: F, torch