code: def diff(x: np.ndarray, y: np.ndarray) -> np.ndarray:
      return np.mean(np.abs(x - y))
  
file_path: gluonts/test/mx/distribution/test_nan_mixture.py
imports: from typing import Dict
  import mxnet
  import numpy
  import pytest
  from gluonts.core.serde import dump_json, load_json
  from gluonts.gluonts_tqdm import tqdm
  from gluonts.mx import Tensor
  from gluonts.mx.distribution import Categorical, CategoricalOutput, Gaussian, GaussianOutput, NanMixture, NanMixtureOutput, StudentTOutput
label_desc: Use image node_id 1 for calling a global function with example usage: diff(x, y) and returns: np