code: def sort():
      h2o.remove_all()
      df = h2o.import_file(
          pyunit_utils.locate(
              "bigdata/laptop/jira/PUBDEV_6829_srot_bug_bigKey_part.csv.zip"
          )
      )
      t1 = time.time()
      df1 = df.sort([1])
      assert df1[0, 1] <= df1[1, 1], "Test failed: Sort bug."
      print(
          "Time taken to perform sort is {0}".format(time.time() - t1)
      )
      pyunit_utils.check_sorted_1_column(
          df1, 1, prob=0.00001, ascending=True
      )
  
imports: import sys
  from tests import pyunit_utils
  import time
  import h2o
label_desc: Use image node_id 1 for calling a global function with example usage: sort() without return types