class_docstr: Helper class for comparing sframe and sarrays
  
  Adapted from test_sframe.py
code: def _assert_sframe_equal(self, sf1, sf2):
      assert sf1.num_rows() == sf2.num_rows()
      assert sf1.num_columns() == sf2.num_columns()
      assert set(sf1.column_names()) == set(sf2.column_names())
      assert_frame_equal(sf1.to_dataframe(), sf2.to_dataframe())
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import random
  import tempfile
  import shutil
  import math
  import string
  import numpy
  from pandas.util.testing import assert_frame_equal
  from ..None import SArray
  import turicreate
  import sys
  from six import StringIO
  import pytest
label_desc: Use image node_id 2 for calling the SFrameComparer obj's underlying member method code with example usage: obj._assert_sframe_equal(sf1, sf2) without return types