code: def pubdev_5394():
      l = list(range(100))
      l.append("#")
      tmp = tempfile.NamedTemporaryFile(suffix=".tsv")
      try:
          df = pd.DataFrame({1: l, 2: l, 3: l, 4: l, 5: l})
          df.to_csv(tmp.name, sep="\t", index=False)
  
          # One line ignored in default settings
          df = h2o.import_file(tmp.name, header=1)
          assert df.nrows == len(l) - 1
  
          # No lines ignored, as non-data line markers are overridden/empty
          df = h2o.import_file(
              tmp.name, header=1, custom_non_data_line_markers=""
          )
          assert df.nrows == len(l)
      finally:
          tmp.close()
  
imports: import h2o
  import pandas
  import tempfile
  from tests import pyunit_utils
label_desc: Use image node_id 1 for calling a global function with example usage: pubdev_5394() without return types