code: def testLarge2000x2000(self):
      x_np = self._random_matrix(np.float32, (2000, 2000))
      self._test(x_np, full_matrices=True)
  
imports: import itertools
  import unittest
  from absl.testing import parameterized
  import numpy
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 8 for calling the QrOpTest obj's underlying member method code with example usage: obj.testLarge2000x2000() without return types