code: def testAccumulatorCancel(self):
      with self.cached_session() as sess:
          q = data_flow_ops.ConditionalAccumulator(
              dtypes_lib.float32,
              name="Q",
              shape=tensor_shape.TensorShape([1]),
          )
          takeg_t = q.take_grad(1)
  
          takeg_thread = self.checkedThread(
              self._blocking_takeg, args=(sess, takeg_t)
          )
  
          takeg_thread.start()
  
          time.sleep(1.0)
  
          sess.close()  # Will cancel blocked operation
  
          takeg_thread.join()
  
imports: import time
  import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import data_flow_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import state_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 25 for calling the ConditionalAccumulatorTest obj's underlying member method code with example usage: obj.testAccumulatorCancel() without return types