code: def test_quantize_dequantize(self):
      test_input = np.random.rand(20, 30) * 5
      quantized_data = quantize_util.quantize(test_input)
      dequantized_output = quantize_util.dequantize(quantized_data)
      np.testing.assert_array_almost_equal(
          test_input, dequantized_output, 2
      )
  
imports: import unittest
  import numpy
  import quantize.quantize_util
label_desc: Use image node_id 1 for calling the TestQuantize obj's underlying member method code with example usage: obj.test_quantize_dequantize() without return types