code: def stats_file(tmp_path: Path):
      """Kaldi like style"""
      p = tmp_path / "stats.npy"
  
      count = 10
      np.random.seed(0)
      x = np.random.randn(count, 80)
      s = x.sum(0)
      s = np.pad(s, [0, 1], mode="constant", constant_values=count)
      s2 = (x**2).sum(0)
      s2 = np.pad(s2, [0, 1], mode="constant", constant_values=0.0)
  
      stats = np.stack([s, s2])
      np.save(p, stats)
      return p
  
file_path: espnet/test/espnet2/layers/test_global_mvn.py
imports: from pathlib import Path
  import numpy
  import pytest
  import torch
  from espnet2.layers.global_mvn import GlobalMVN
label_desc: Use image node_id 1 for calling a global function with example usage: stats_file(tmp_path) and returns: p