tf.compat.v1.train.QueueRunner Holds a list of enqueue operations for a queue, each to be run in a thread.  View aliases  Compat aliases for migration 
See Migration guide for more details. tf.compat.v1.train.queue_runner.QueueRunner  
tf.compat.v1.train.QueueRunner(
    queue=None, enqueue_ops=None, close_op=None, cancel_op=None,
    queue_closed_exception_types=None, queue_runner_def=None, import_scope=None
)
 Queues are a convenient TensorFlow mechanism to compute tensors asynchronously using multiple threads. For example in the canonical 'Input Reader' setup one set of threads generates filenames in a queue; a second set of threads read records from the files, processes them, and enqueues tensors on a second queue; a third set of threads dequeues these input records to construct batches and runs them through training operations. There are several delicate issues when running multiple threads that way: closing the queues in sequence as the input is exhausted, correctly catching and reporting exceptions, etc. The QueueRunner, combined with the Coordinator, helps handle these issues.
 


 Args
  queue   A Queue.  
  enqueue_ops   List of enqueue ops to run in threads later.  
  close_op   Op to close the queue. Pending enqueue ops are preserved.  
  cancel_op   Op to close the queue and cancel pending enqueue ops.  
  queue_closed_exception_types   Optional tuple of Exception types that indicate that the queue has been closed when raised during an enqueue operation. Defaults to (tf.errors.OutOfRangeError,). Another common case includes (tf.errors.OutOfRangeError, tf.errors.CancelledError), when some of the enqueue ops may dequeue from other Queues.  
  queue_runner_def   Optional QueueRunnerDef protocol buffer. If specified, recreates the QueueRunner from its contents. queue_runner_def and the other arguments are mutually exclusive.  
  import_scope   Optional string. Name scope to add. Only used when initializing from protocol buffer.   
 


 Raises
  ValueError   If both queue_runner_def and queue are both specified.  
  ValueError   If queue or enqueue_ops are not provided when not restoring from queue_runner_def.  
  RuntimeError   If eager execution is enabled.    Eager Compatibility QueueRunners are not compatible with eager execution. Instead, please use tf.data to get data into your model.
 


 Attributes
  cancel_op  
 
  close_op  
 
  enqueue_ops  
 
  exceptions_raised   Exceptions raised but not handled by the QueueRunner threads. Exceptions raised in queue runner threads are handled in one of two ways depending on whether or not a Coordinator was passed to create_threads():  With a Coordinator, exceptions are reported to the coordinator and forgotten by the QueueRunner. Without a Coordinator, exceptions are captured by the QueueRunner and made available in this exceptions_raised property. 

 
  name   The string name of the underlying Queue.  
  queue  
 
  queue_closed_exception_types  
   Methods create_threads View source 
create_threads(
    sess, coord=None, daemon=False, start=False
)
 Create threads to run the enqueue ops for the given session. This method requires a session in which the graph was launched. It creates a list of threads, optionally starting them. There is one thread for each op passed in enqueue_ops. The coord argument is an optional coordinator that the threads will use to terminate together and report exceptions. If a coordinator is given, this method starts an additional thread to close the queue when the coordinator requests a stop. If previously created threads for the given session are still running, no new threads will be created.
 


 Args
  sess   A Session.  
  coord   Optional Coordinator object for reporting errors and checking stop conditions.  
  daemon   Boolean. If True make the threads daemon threads.  
  start   Boolean. If True starts the threads. If False the caller must call the start() method of the returned threads.   
 


 Returns   A list of threads.  
 from_proto View source 
@staticmethod
from_proto(
    queue_runner_def, import_scope=None
)
 Returns a QueueRunner object created from queue_runner_def. to_proto View source 
to_proto(
    export_scope=None
)
 Converts this QueueRunner to a QueueRunnerDef protocol buffer.
 


 Args
  export_scope   Optional string. Name scope to remove.   
 


 Returns   A QueueRunnerDef protocol buffer, or None if the Variable is not in the specified name scope.