Add backward compatbility for RecordSerializer and RecordDeserializer

src/sagemaker/amazon/common.py

@@ -13,210 +13,13 @@
 """Placeholder docstring"""
 from __future__ import absolute_import
 
-import logging
-import struct
-import sys
-
-import numpy as np
-
-from sagemaker.amazon.record_pb2 import Record
-from sagemaker.utils import DeferredError
-
-
-def _write_feature_tensor(resolved_type, record, vector):
-    """Placeholder Docstring"""
-    if resolved_type == "Int32":
-        record.features["values"].int32_tensor.values.extend(vector)
-    elif resolved_type == "Float64":
-        record.features["values"].float64_tensor.values.extend(vector)
-    elif resolved_type == "Float32":
-        record.features["values"].float32_tensor.values.extend(vector)
-
-
-def _write_label_tensor(resolved_type, record, scalar):
-    """Placeholder Docstring"""
-    if resolved_type == "Int32":
-        record.label["values"].int32_tensor.values.extend([scalar])
-    elif resolved_type == "Float64":
-        record.label["values"].float64_tensor.values.extend([scalar])
-    elif resolved_type == "Float32":
-        record.label["values"].float32_tensor.values.extend([scalar])
-
-
-def _write_keys_tensor(resolved_type, record, vector):
-    """Placeholder Docstring"""
-    if resolved_type == "Int32":
-        record.features["values"].int32_tensor.keys.extend(vector)
-    elif resolved_type == "Float64":
-        record.features["values"].float64_tensor.keys.extend(vector)
-    elif resolved_type == "Float32":
-        record.features["values"].float32_tensor.keys.extend(vector)
-
-
-def _write_shape(resolved_type, record, scalar):
-    """Placeholder Docstring"""
-    if resolved_type == "Int32":
-        record.features["values"].int32_tensor.shape.extend([scalar])
-    elif resolved_type == "Float64":
-        record.features["values"].float64_tensor.shape.extend([scalar])
-    elif resolved_type == "Float32":
-        record.features["values"].float32_tensor.shape.extend([scalar])
-
-
-def write_numpy_to_dense_tensor(file, array, labels=None):
-    """Writes a numpy array to a dense tensor
-
-    Args:
-        file:
-        array:
-        labels:
-    """
-
-    # Validate shape of array and labels, resolve array and label types
-    if not len(array.shape) == 2:
-        raise ValueError("Array must be a Matrix")
-    if labels is not None:
-        if not len(labels.shape) == 1:
-            raise ValueError("Labels must be a Vector")
-        if labels.shape[0] not in array.shape:
-            raise ValueError(
-                "Label shape {} not compatible with array shape {}".format(
-                    labels.shape, array.shape
-                )
-            )
-        resolved_label_type = _resolve_type(labels.dtype)
-    resolved_type = _resolve_type(array.dtype)
-
-    # Write each vector in array into a Record in the file object
-    record = Record()
-    for index, vector in enumerate(array):
-        record.Clear()
-        _write_feature_tensor(resolved_type, record, vector)
-        if labels is not None:
-            _write_label_tensor(resolved_label_type, record, labels[index])
-        _write_recordio(file, record.SerializeToString())
-
-
-def write_spmatrix_to_sparse_tensor(file, array, labels=None):
-    """Writes a scipy sparse matrix to a sparse tensor
-
-    Args:
-        file:
-        array:
-        labels:
-    """
-    try:
-        import scipy
-    except ImportError as e:
-        logging.warning(
-            "scipy failed to import. Sparse matrix functions will be impaired or broken."
-        )
-        # Any subsequent attempt to use scipy will raise the ImportError
-        scipy = DeferredError(e)
-
-    if not scipy.sparse.issparse(array):
-        raise TypeError("Array must be sparse")
-
-    # Validate shape of array and labels, resolve array and label types
-    if not len(array.shape) == 2:
-        raise ValueError("Array must be a Matrix")
-    if labels is not None:
-        if not len(labels.shape) == 1:
-            raise ValueError("Labels must be a Vector")
-        if labels.shape[0] not in array.shape:
-            raise ValueError(
-                "Label shape {} not compatible with array shape {}".format(
-                    labels.shape, array.shape
-                )
-            )
-        resolved_label_type = _resolve_type(labels.dtype)
-    resolved_type = _resolve_type(array.dtype)
-
-    csr_array = array.tocsr()
-    n_rows, n_cols = csr_array.shape
-
-    record = Record()
-    for row_idx in range(n_rows):
-        record.Clear()
-        row = csr_array.getrow(row_idx)
-        # Write values
-        _write_feature_tensor(resolved_type, record, row.data)
-        # Write keys
-        _write_keys_tensor(resolved_type, record, row.indices.astype(np.uint64))
-
-        # Write labels
-        if labels is not None:
-            _write_label_tensor(resolved_label_type, record, labels[row_idx])
-
-        # Write shape
-        _write_shape(resolved_type, record, n_cols)
-
-        _write_recordio(file, record.SerializeToString())
-
-
-def read_records(file):
-    """Eagerly read a collection of amazon Record protobuf objects from file.
-
-    Args:
-        file:
-    """
-    records = []
-    for record_data in read_recordio(file):
-        record = Record()
-        record.ParseFromString(record_data)
-        records.append(record)
-    return records
-
-
-# MXNet requires recordio records have length in bytes that's a multiple of 4
-# This sets up padding bytes to append to the end of the record, for diferent
-# amounts of padding required.
-padding = {}
-for amount in range(4):
-    if sys.version_info >= (3,):
-        padding[amount] = bytes([0x00 for _ in range(amount)])
-    else:
-        padding[amount] = bytearray([0x00 for _ in range(amount)])
-
-_kmagic = 0xCED7230A
-
-
-def _write_recordio(f, data):
-    """Writes a single data point as a RecordIO record to the given file.
-
-    Args:
-        f:
-        data:
-    """
-    length = len(data)
-    f.write(struct.pack("I", _kmagic))
-    f.write(struct.pack("I", length))
-    pad = (((length + 3) >> 2) << 2) - length
-    f.write(data)
-    f.write(padding[pad])
-
-
-def read_recordio(f):
-    """Placeholder Docstring"""
-    while True:
-        try:
-            (read_kmagic,) = struct.unpack("I", f.read(4))
-        except struct.error:
-            return
-        assert read_kmagic == _kmagic
-        (len_record,) = struct.unpack("I", f.read(4))
-        pad = (((len_record + 3) >> 2) << 2) - len_record
-        yield f.read(len_record)
-        if pad:
-            f.read(pad)
-
-
-def _resolve_type(dtype):
-    """Placeholder Docstring"""
-    if dtype == np.dtype(int):
-        return "Int32"
-    if dtype == np.dtype(float):
-        return "Float64"
-    if dtype == np.dtype("float32"):
-        return "Float32"
-    raise ValueError("Unsupported dtype {} on array".format(dtype))
+# these imports ensure backward compatibility.
+from sagemaker.deserializers import RecordDeserializer  # noqa: F401 # pylint: disable=W0611
+from sagemaker.serializers import RecordSerializer  # noqa: F401 # pylint: disable=W0611
+from sagemaker.serializer_utils import (  # noqa: F401 # pylint: disable=W0611
+    read_recordio,
+    read_records,
+    write_numpy_to_dense_tensor,
+    write_spmatrix_to_sparse_tensor,
+    _write_recordio,
+)

src/sagemaker/base_deserializers.py

@@ -23,7 +23,7 @@
 import numpy as np
 from six import with_metaclass
 
-from sagemaker.amazon.common import read_records
+from sagemaker.serializer_utils import read_records
 from sagemaker.utils import DeferredError
 
 try:

src/sagemaker/base_serializers.py

@@ -22,7 +22,7 @@
 from pandas import DataFrame
 from six import with_metaclass
 
-from sagemaker.amazon.common import write_numpy_to_dense_tensor
+from sagemaker.serializer_utils import write_numpy_to_dense_tensor
 from sagemaker.utils import DeferredError
 
 try: