code: def h2o_H2OFrame_toupper():
      """
      Python API test: h2o.frame.H2OFrame.toupper()
      """
      frame = h2o.import_file(
          path=pyunit_utils.locate("smalldata/iris/iris.csv")
      )
      frame["C5"] = frame["C5"].toupper()
  
      assert (
          frame["C5"] == "IRIS-SETOSA"
      ).sum() == 50, "h2o.H2OFrame.toupper() command is not working."
  
imports: import sys
  import h2o
  from tests import pyunit_utils
  from h2o.utils.typechecks import assert_is_type
  from random import randrange
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: h2o_H2OFrame_toupper() without return types