code: def setup_class(cls):
      np.random.seed(12345)
      cls.weight = np.random.randint(1, 4, size=60)
      cls.duration = np.random.randint(1, 3, size=60)
      cls.days = np.log(np.random.randint(1, 30, size=60))
  
file_path: statsmodels/statsmodels/graphics/tests/test_factorplots.py
imports: import numpy
  from numpy.testing import assert_equal, assert_raises
  from pandas import Series
  import pytest
  from statsmodels.graphics.factorplots import _recode, interaction_plot
label_desc: Use image node_id 1 for calling the TestInteractionPlot obj's underlying member method code with example usage: obj.setup_class(cls) without return types