tf.contrib.learn.read_keyed_batch_examples

tf.contrib.learn.read_keyed_batch_examples(
    file_pattern,
    batch_size,
    reader,
    randomize_input=True,
    num_epochs=None,
    queue_capacity=10000,
    num_threads=1,
    read_batch_size=1,
    parse_fn=None,
    name=None,
    seed=None
)

Defined in tensorflow/contrib/learn/python/learn/learn_io/graph_io.py.

Adds operations to read, queue, batch Example protos. (deprecated)

THIS FUNCTION IS DEPRECATED. It will be removed in a future version. Instructions for updating: Use tf.data.

Given file pattern (or list of files), will setup a queue for file names, read Example proto using provided reader, use batch queue to create batches of examples of size batch_size.

All queue runners are added to the queue runners collection, and may be started via start_queue_runners.

All ops are added to the default graph.

Use parse_fn if you need to do parsing / processing on single examples.

Args:

• file_pattern: List of files or patterns of file paths containing Example records. See tf.gfile.Glob for pattern rules.
• batch_size: An int or scalar Tensor specifying the batch size to use.
• reader: A function or class that returns an object with read method, (filename tensor) -> (example tensor).
• randomize_input: Whether the input should be randomized.
• num_epochs: Integer specifying the number of times to read through the dataset. If None, cycles through the dataset forever. NOTE - If specified, creates a variable that must be initialized, so call tf.local_variables_initializer() and run the op in a session.
• queue_capacity: Capacity for input queue.
• num_threads: The number of threads enqueuing examples. In order to have predictable and repeatable order of reading and enqueueing, such as in prediction and evaluation mode, num_threads should be 1.
• read_batch_size: An int or scalar Tensor specifying the number of records to read at once.
• parse_fn: Parsing function, takes Example Tensor returns parsed representation. If None, no parsing is done.
• name: Name of resulting op.
• seed: An integer (optional). Seed used if randomize_input == True.

Returns:

Returns tuple of: - Tensor of string keys. - String Tensor of batched Example proto.

Raises:

• ValueError: for invalid inputs.