code: def testNoIntegerGradient1(self, use_tape):
      with test_util.AbstractGradientTape(use_tape=use_tape) as tape:
          x = constant_op.constant([3.9, 4.1])
          tape.watch(x)
  
          k = math_ops.cast(
              math_ops.cast(x, dtypes.int32), dtypes.float32
          )
          y = k * k
          dy_dx = tape.gradient(y, x)
          self.assertIsNone(dy_dx)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 5 for calling the GradientCorrectnessTest obj's underlying member method code with example usage: obj.testNoIntegerGradient1(use_tape) without return types