code: def test_histogram_attributes():
      hist1, hist2, hist3 = get_histograms()
  
      assert not is_numeric(hist1)
      assert not is_timestamp(hist1)
      assert is_numeric(hist2)
      assert not is_timestamp(hist2)
      assert is_numeric(hist3)
      assert is_timestamp(hist3)
  
file_path: popmon/tests/popmon/hist/test_histogram.py
imports: import histogrammar
  import numpy
  import pandas
  from popmon.hist.hist_utils import is_numeric, is_timestamp, project_on_x, project_split2dhist_on_axis, sparse_bin_centers_x, split_hist_along_first_dimension, sum_entries, sum_over_x
label_desc: Use image node_id 5 for calling a global function with example usage: test_histogram_attributes() without return types