code: def unittest():
      tc = ut.TestCase("__init__")
      tc.longMessage = True
      return tc
  
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 10 for calling a global function with example usage: unittest() and returns: tc