code: def pyunit_types():
      fr = h2o.import_file(
          pyunit_utils.locate("smalldata/logreg/prostate.csv")
      )
      include_cols = fr.filter_na_cols()  # should be all columns
      assert lists_equal(include_cols, list(range(fr.ncol)))
  
      fr[1, 1] = None  # make a value None, filter out the second column
  
      include_cols = fr.filter_na_cols(0.001)
      print(include_cols)
      assert lists_equal(include_cols, [0, 2, 3, 4, 5, 6, 7, 8])
  
imports: from builtins import range
  import sys
  import h2o
  from tests import pyunit_utils
label_desc: Use image node_id 2 for calling a global function with example usage: pyunit_types() without return types