code: def test_normalize_geo():
      geo = plot(data, show=False)
      norm_data = normalize(geo, normalize="row")
      assert np.allclose(np.mean(np.vstack(norm_data), axis=1), 0)
  
file_path: hypertools/tests/test_normalize.py
imports: import numpy
  from hypertools.tools.normalize import normalize
  from hypertools.plot.plot import plot
label_desc: Use image node_id 5 for calling a global function with example usage: test_normalize_geo() without return types