code: def initialize(cls):
      cls.tbl_obj = ctab.Table2x2(cls.table)
      cls.tbl_data_obj = ctab.Table2x2.from_data(cls.data)
  
imports: import os
  import warnings
  import numpy
  import statsmodels.stats.contingency_tables
  import pandas
  from numpy.testing import assert_allclose, assert_equal
  import statsmodels.api
label_desc: Use image node_id 1 for calling the Check2x2Mixin obj's underlying member method code with example usage: obj.initialize(cls) without return types