A Reader that outputs fixed-length records from a file.
Inherits From: ReaderBase
tf.compat.v1.FixedLengthRecordReader(
record_bytes, header_bytes=None, footer_bytes=None, hop_bytes=None, name=None,
encoding=None
)
See ReaderBase for supported methods.
Args |
record_bytes
|
An int.
|
header_bytes
|
An optional int. Defaults to 0.
|
footer_bytes
|
An optional int. Defaults to 0.
|
hop_bytes
|
An optional int. Defaults to 0.
|
name
|
A name for the operation (optional).
|
encoding
|
The type of encoding for the file. Defaults to none.
|
Eager Compatibility
Readers are not compatible with eager execution. Instead, please
use tf.data
to get data into your model.
Attributes |
reader_ref
|
Op that implements the reader.
|
supports_serialize
|
Whether the Reader implementation can serialize its state.
|
Methods
num_records_produced
View source
num_records_produced(
name=None
)
Returns the number of records this reader has produced.
This is the same as the number of Read executions that have
succeeded.
Args |
name
|
A name for the operation (optional).
|
num_work_units_completed
View source
num_work_units_completed(
name=None
)
Returns the number of work units this reader has finished processing.
Args |
name
|
A name for the operation (optional).
|
read
View source
read(
queue, name=None
)
Returns the next record (key, value) pair produced by a reader.
Will dequeue a work unit from queue if necessary (e.g. when the
Reader needs to start reading from a new file since it has
finished with the previous file).
Args |
queue
|
A Queue or a mutable string Tensor representing a handle
to a Queue, with string work items.
|
name
|
A name for the operation (optional).
|
Returns |
A tuple of Tensors (key, value).
|
key
|
A string scalar Tensor.
|
value
|
A string scalar Tensor.
|
read_up_to
View source
read_up_to(
queue, num_records, name=None
)
Returns up to num_records (key, value) pairs produced by a reader.
Will dequeue a work unit from queue if necessary (e.g., when the
Reader needs to start reading from a new file since it has
finished with the previous file).
It may return less than num_records even before the last batch.
Args |
queue
|
A Queue or a mutable string Tensor representing a handle
to a Queue, with string work items.
|
num_records
|
Number of records to read.
|
name
|
A name for the operation (optional).
|
Returns |
A tuple of Tensors (keys, values).
|
keys
|
A 1-D string Tensor.
|
values
|
A 1-D string Tensor.
|
reset
View source
reset(
name=None
)
Restore a reader to its initial clean state.
Args |
name
|
A name for the operation (optional).
|
Returns |
The created Operation.
|
restore_state
View source
restore_state(
state, name=None
)
Restore a reader to a previously saved state.
Not all Readers support being restored, so this can produce an
Unimplemented error.
Args |
state
|
A string Tensor.
Result of a SerializeState of a Reader with matching type.
|
name
|
A name for the operation (optional).
|
Returns |
The created Operation.
|
serialize_state
View source
serialize_state(
name=None
)
Produce a string tensor that encodes the state of a reader.
Not all Readers support being serialized, so this can produce an
Unimplemented error.
Args |
name
|
A name for the operation (optional).
|