code: def clustergram_data():
      return pd.read_csv(
          os.path.join(
              os.path.dirname(__file__), "data/clustergram_mtcars.tsv"
          ),
          sep="	",
          skiprows=4,
      ).set_index("model")
  
imports: import getpass
  import os
  import random
  import string
  import unittest
  import numpy
  import pandas
  import pytest
  from pandas.tseries.offsets import Day
  from past.utils import old_div
  from six import PY3
label_desc: Use image node_id 19 for calling a global function with example usage: clustergram_data() and returns: pd