code: def test_hist():
      df = h2o.upload_file(
          pyunit_utils.locate("smalldata/iris/iris.csv")
      )
      df.describe()
  
      h = df[0].hist(breaks=5, plot=False)
      assert h.nrow == 5
  
      h = df[0].hist(breaks=3, plot=False)
      assert h.nrow == 3
  
      h = df[0].hist(breaks=[0, 0.5, 2, 3], plot=False)
      assert h.nrow == 4
  
      h = df[0].hist(breaks="Sturges", plot=False)
      assert h.nrow == 9
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_hist() without return types