code: def data(request):
      data = np.array(
          [
              [4, 8, 7, 6, 5, 2, 1],
              [6, 7, 9, 6, 9, 3, 6],
              [5, 1, 6, 8, 4, 7, 8],
              [6, 8, 1, 5, 6, 7, 4],
          ]
      )
  
      request.cls.data = data
  
file_path: yellowbrick/tests/test_draw.py
imports: import pytest
  import numpy
  import matplotlib.pyplot
  from yellowbrick.draw import *
  from .base import VisualTestCase
label_desc: Use image node_id 2 for calling a global function with example usage: data(request) without return types