code: def test_nopscaler(target, observed):
      s = scaler.NOPScaler()
      target_scaled, loc, scale = s(target, observed)
  
      assert torch.allclose(torch.zeros(target.shape[:-1]), loc)
      assert torch.allclose(target, target_scaled)
      assert torch.allclose(torch.ones(target.shape[:-1]), scale)
  
imports: import torch
  import pytest
  from gluonts.torch import scaler
label_desc: Use image node_id 2 for calling a global function with example usage: test_nopscaler(target, observed) without return types