code: def h2o_H2OFrame_isna():
      """
      Python API test: h2o.frame.H2OFrame.isna()
  
      Copied from pyunit_isin.py
      """
      iris = h2o.import_file(
          path=pyunit_utils.locate("smalldata/iris/iris_wheader.csv")
      )
      temp = iris.isna()  # contains no NAs
      assert_is_type(temp, H2OFrame)  # check return type
      assert not (
          temp.all()
      ), "h2o.H2OFrame.isna() command is not working."
  
      iris_NA = h2o.import_file(
          path=pyunit_utils.locate("smalldata/iris/iris_wheader_NA.csv")
      )
      temp_NA = iris_NA.isna()
      assert_is_type(temp_NA, H2OFrame)  # check return type
      assert (
          temp_NA.any()
      ), "h2o.H2OFrame.isna() command is not working."
  
imports: import sys
  import h2o
  from tests import pyunit_utils
  from h2o.utils.typechecks import assert_is_type
  from h2o.frame import H2OFrame
label_desc: Use image node_id 1 for calling a global function with example usage: h2o_H2OFrame_isna() without return types