code: def h2o_H2OFrame_var():
      """
      Python API test: h2o.frame.H2OFrame.var(y=None, na_rm=False, use=None)
  
      Copied from pyunit_var.py
      """
      iris_h2o = h2o.import_file(
          path=pyunit_utils.locate("smalldata/iris/iris_wheader.csv")
      )
      iris_np = np.genfromtxt(
          pyunit_utils.locate("smalldata/iris/iris_wheader.csv"),
          delimiter=",",
          skip_header=1,
          usecols=(0, 1, 2, 3),
      )
  
      var_np = np.var(iris_np, axis=0, ddof=1)
      for i in range(4):
          var_h2o = iris_h2o.var(y=iris_h2o[i], na_rm=True, use=None)
          assert_is_type(var_h2o, H2OFrame)
          assert (
              abs(var_np[i] - var_h2o[i, 0]) < 1e-10
          ), "h2o.H2OFrame.var() command is not working."
  
imports: import sys
  import h2o
  from tests import pyunit_utils
  from h2o.utils.typechecks import assert_is_type
  import numpy
  from h2o.frame import H2OFrame
label_desc: Use image node_id 1 for calling a global function with example usage: h2o_H2OFrame_var() without return types