mindspore/tests/ut/python/dataset/test_minddataset.py

# Copyright 2019 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""
This is the test module for mindrecord
"""
import collections
import json
import numpy as np
import os
import pytest
import re
import string

import mindspore.dataset as ds
import mindspore.dataset.transforms.vision.c_transforms as vision
from mindspore import log as logger
from mindspore.dataset.transforms.vision import Inter
from mindspore.mindrecord import FileWriter

FILES_NUM = 4
CV_FILE_NAME = "../data/mindrecord/imagenet.mindrecord"
CV1_FILE_NAME = "../data/mindrecord/imagenet1.mindrecord"
CV2_FILE_NAME = "../data/mindrecord/imagenet2.mindrecord"
CV_DIR_NAME = "../data/mindrecord/testImageNetData"
NLP_FILE_NAME = "../data/mindrecord/aclImdb.mindrecord"
OLD_NLP_FILE_NAME = "../data/mindrecord/testOldVersion/aclImdb.mindrecord"
NLP_FILE_POS = "../data/mindrecord/testAclImdbData/pos"
NLP_FILE_VOCAB = "../data/mindrecord/testAclImdbData/vocab.txt"


@pytest.fixture
def add_and_remove_cv_file():
    """add/remove cv file"""
    paths = ["{}{}".format(CV_FILE_NAME, str(x).rjust(1, '0'))
             for x in range(FILES_NUM)]
    for x in paths:
        os.remove("{}".format(x)) if os.path.exists("{}".format(x)) else None
        os.remove("{}.db".format(x)) if os.path.exists(
            "{}.db".format(x)) else None
    writer = FileWriter(CV_FILE_NAME, FILES_NUM)
    data = get_data(CV_DIR_NAME)
    cv_schema_json = {"id": {"type": "int32"},
                      "file_name": {"type": "string"},
                      "label": {"type": "int32"},
                      "data": {"type": "bytes"}}
    writer.add_schema(cv_schema_json, "img_schema")
    writer.add_index(["file_name", "label"])
    writer.write_raw_data(data)
    writer.commit()
    yield "yield_cv_data"
    for x in paths:
        os.remove("{}".format(x))
        os.remove("{}.db".format(x))


@pytest.fixture
def add_and_remove_nlp_file():
    """add/remove nlp file"""
    paths = ["{}{}".format(NLP_FILE_NAME, str(x).rjust(1, '0'))
             for x in range(FILES_NUM)]
    for x in paths:
        if os.path.exists("{}".format(x)):
            os.remove("{}".format(x))
        if os.path.exists("{}.db".format(x)):
            os.remove("{}.db".format(x))
    writer = FileWriter(NLP_FILE_NAME, FILES_NUM)
    data = [x for x in get_nlp_data(NLP_FILE_POS, NLP_FILE_VOCAB, 10)]
    nlp_schema_json = {"id": {"type": "string"}, "label": {"type": "int32"},
                       "rating": {"type": "float32"},
                       "input_ids": {"type": "int64",
                                     "shape": [-1]},
                       "input_mask": {"type": "int64",
                                      "shape": [1, -1]},
                       "segment_ids": {"type": "int64",
                                       "shape": [2, -1]}
                       }
    writer.set_header_size(1 << 14)
    writer.set_page_size(1 << 15)
    writer.add_schema(nlp_schema_json, "nlp_schema")
    writer.add_index(["id", "rating"])
    writer.write_raw_data(data)
    writer.commit()
    yield "yield_nlp_data"
    for x in paths:
        os.remove("{}".format(x))
        os.remove("{}.db".format(x))


@pytest.fixture
def add_and_remove_nlp_compress_file():
    """add/remove nlp file"""
    paths = ["{}{}".format(NLP_FILE_NAME, str(x).rjust(1, '0'))
             for x in range(FILES_NUM)]
    for x in paths:
        if os.path.exists("{}".format(x)):
            os.remove("{}".format(x))
        if os.path.exists("{}.db".format(x)):
            os.remove("{}.db".format(x))
    writer = FileWriter(NLP_FILE_NAME, FILES_NUM)
    data = []
    for row_id in range(16):
        data.append({
            "label": row_id,
            "array_a": np.reshape(np.array([0, 1, -1, 127, -128, 128, -129,
                                            255, 256, -32768, 32767, -32769, 32768, -2147483648,
                                            2147483647], dtype=np.int32), [-1]),
            "array_b": np.reshape(np.array([0, 1, -1, 127, -128, 128, -129, 255,
                                            256, -32768, 32767, -32769, 32768, -2147483648, 2147483647, -2147483649, 2147483649, -922337036854775808, 9223372036854775807]), [1, -1]),
            "array_c": str.encode("nlp data"),
            "array_d": np.reshape(np.array([[-10, -127], [10, 127]]), [2, -1])
        })
    nlp_schema_json = {"label": {"type": "int32"},
                       "array_a": {"type": "int32",
                                   "shape": [-1]},
                       "array_b": {"type": "int64",
                                   "shape": [1, -1]},
                       "array_c": {"type": "bytes"},
                       "array_d": {"type": "int64",
                                   "shape": [2, -1]}
                       }
    writer.set_header_size(1 << 14)
    writer.set_page_size(1 << 15)
    writer.add_schema(nlp_schema_json, "nlp_schema")
    writer.write_raw_data(data)
    writer.commit()
    yield "yield_nlp_data"
    for x in paths:
        os.remove("{}".format(x))
        os.remove("{}.db".format(x))


def test_nlp_compress_data(add_and_remove_nlp_compress_file):
    """tutorial for nlp minderdataset."""
    data = []
    for row_id in range(16):
        data.append({
            "label": row_id,
            "array_a": np.reshape(np.array([0, 1, -1, 127, -128, 128, -129,
                                            255, 256, -32768, 32767, -32769, 32768, -2147483648,
                                            2147483647], dtype=np.int32), [-1]),
            "array_b": np.reshape(np.array([0, 1, -1, 127, -128, 128, -129, 255,
                                            256, -32768, 32767, -32769, 32768, -2147483648, 2147483647, -2147483649, 2147483649, -922337036854775808, 9223372036854775807]), [1, -1]),
            "array_c": str.encode("nlp data"),
            "array_d": np.reshape(np.array([[-10, -127], [10, 127]]), [2, -1])
        })
    num_readers = 1
    data_set = ds.MindDataset(
        NLP_FILE_NAME + "0", None, num_readers, shuffle=False)
    assert data_set.get_dataset_size() == 16
    num_iter = 0
    for x, item in zip(data, data_set.create_dict_iterator()):
        assert (item["array_a"] == x["array_a"]).all()
        assert (item["array_b"] == x["array_b"]).all()
        assert item["array_c"].tobytes() == x["array_c"]
        assert (item["array_d"] == x["array_d"]).all()
        assert item["label"] == x["label"]
        num_iter += 1
    assert num_iter == 16


def test_nlp_compress_data_old_version(add_and_remove_nlp_compress_file):
    """tutorial for nlp minderdataset."""
    num_readers = 1
    data_set = ds.MindDataset(
        NLP_FILE_NAME + "0", None, num_readers, shuffle=False)
    old_data_set = ds.MindDataset(
        OLD_NLP_FILE_NAME + "0", None, num_readers, shuffle=False)
    assert old_data_set.get_dataset_size() == 16
    num_iter = 0
    for x, item in zip(old_data_set.create_dict_iterator(), data_set.create_dict_iterator()):
        assert (item["array_a"] == x["array_a"]).all()
        assert (item["array_b"] == x["array_b"]).all()
        assert (item["array_c"] == x["array_c"]).all()
        assert (item["array_d"] == x["array_d"]).all()
        assert item["label"] == x["label"]
        num_iter += 1
    assert num_iter == 16


def test_cv_minddataset_writer_tutorial():
    """tutorial for cv dataset writer."""
    paths = ["{}{}".format(CV_FILE_NAME, str(x).rjust(1, '0'))
             for x in range(FILES_NUM)]
    for x in paths:
        os.remove("{}".format(x)) if os.path.exists("{}".format(x)) else None
        os.remove("{}.db".format(x)) if os.path.exists(
            "{}.db".format(x)) else None
    writer = FileWriter(CV_FILE_NAME, FILES_NUM)
    data = get_data(CV_DIR_NAME)
    cv_schema_json = {"file_name": {"type": "string"}, "label": {"type": "int32"},
                      "data": {"type": "bytes"}}
    writer.add_schema(cv_schema_json, "img_schema")
    writer.add_index(["file_name", "label"])
    writer.write_raw_data(data)
    writer.commit()
    for x in paths:
        os.remove("{}".format(x))
        os.remove("{}.db".format(x))


def test_cv_minddataset_partition_tutorial(add_and_remove_cv_file):
    """tutorial for cv minddataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4

    def partitions(num_shards):
        for partition_id in range(num_shards):
            data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers,
                                      num_shards=num_shards, shard_id=partition_id)
            num_iter = 0
            for item in data_set.create_dict_iterator():
                logger.info(
                    "-------------- partition : {} ------------------------".format(partition_id))
                logger.info(
                    "-------------- item[label]: {} -----------------------".format(item["label"]))
                num_iter += 1
        return num_iter

    assert partitions(4) == 3
    assert partitions(5) == 2
    assert partitions(9) == 2


def test_cv_minddataset_dataset_size(add_and_remove_cv_file):
    """tutorial for cv minddataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)
    assert data_set.get_dataset_size() == 10
    repeat_num = 2
    data_set = data_set.repeat(repeat_num)
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- get dataset size {} -----------------".format(num_iter))
        logger.info(
            "-------------- item[label]: {} ---------------------".format(item["label"]))
        logger.info(
            "-------------- item[data]: {} ----------------------".format(item["data"]))
        num_iter += 1
    assert num_iter == 20
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers,
                              num_shards=4, shard_id=3)
    assert data_set.get_dataset_size() == 3


def test_cv_minddataset_repeat_reshuffle(add_and_remove_cv_file):
    """tutorial for cv minddataset."""
    columns_list = ["data", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)
    decode_op = vision.Decode()
    data_set = data_set.map(
        input_columns=["data"], operations=decode_op, num_parallel_workers=2)
    resize_op = vision.Resize((32, 32), interpolation=Inter.LINEAR)
    data_set = data_set.map(input_columns="data",
                            operations=resize_op, num_parallel_workers=2)
    data_set = data_set.batch(2)
    data_set = data_set.repeat(2)
    num_iter = 0
    labels = []
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- get dataset size {} -----------------".format(num_iter))
        logger.info(
            "-------------- item[label]: {} ---------------------".format(item["label"]))
        logger.info(
            "-------------- item[data]: {} ----------------------".format(item["data"]))
        num_iter += 1
        labels.append(item["label"])
    assert num_iter == 10
    logger.info("repeat shuffle: {}".format(labels))
    assert len(labels) == 10
    assert labels[0:5] == labels[0:5]
    assert labels[0:5] != labels[5:5]


def test_cv_minddataset_batch_size_larger_than_records(add_and_remove_cv_file):
    """tutorial for cv minddataset."""
    columns_list = ["data", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)
    decode_op = vision.Decode()
    data_set = data_set.map(
        input_columns=["data"], operations=decode_op, num_parallel_workers=2)
    resize_op = vision.Resize((32, 32), interpolation=Inter.LINEAR)
    data_set = data_set.map(input_columns="data",
                            operations=resize_op, num_parallel_workers=2)
    data_set = data_set.batch(32, drop_remainder=True)
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- get dataset size {} -----------------".format(num_iter))
        logger.info(
            "-------------- item[label]: {} ---------------------".format(item["label"]))
        logger.info(
            "-------------- item[data]: {} ----------------------".format(item["data"]))
        num_iter += 1
    assert num_iter == 0


def test_cv_minddataset_issue_888(add_and_remove_cv_file):
    """issue 888 test."""
    columns_list = ["data", "label"]
    num_readers = 2
    data = ds.MindDataset(CV_FILE_NAME + "0", columns_list,
                          num_readers, shuffle=False, num_shards=5, shard_id=1)
    data = data.shuffle(2)
    data = data.repeat(9)
    num_iter = 0
    for item in data.create_dict_iterator():
        num_iter += 1
    assert num_iter == 18


def test_cv_minddataset_blockreader_tutorial(add_and_remove_cv_file):
    """tutorial for cv minddataset."""
    columns_list = ["data", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers,
                              block_reader=True)
    assert data_set.get_dataset_size() == 10
    repeat_num = 2
    data_set = data_set.repeat(repeat_num)
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- block reader repeat tow {} -----------------".format(num_iter))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        num_iter += 1
    assert num_iter == 20


def test_cv_minddataset_blockreader_some_field_not_in_index_tutorial(add_and_remove_cv_file):
    """tutorial for cv minddataset."""
    columns_list = ["id", "data", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers, shuffle=False,
                              block_reader=True)
    assert data_set.get_dataset_size() == 10
    repeat_num = 2
    data_set = data_set.repeat(repeat_num)
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- block reader repeat tow {} -----------------".format(num_iter))
        logger.info(
            "-------------- item[id]: {} ----------------------------".format(item["id"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        num_iter += 1
    assert num_iter == 20


def test_cv_minddataset_reader_file_list(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset([CV_FILE_NAME + str(x)
                               for x in range(FILES_NUM)], columns_list, num_readers)
    assert data_set.get_dataset_size() == 10
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} ------------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} ------------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter == 10


def test_cv_minddataset_reader_one_partition(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset([CV_FILE_NAME + "0"], columns_list, num_readers)
    assert data_set.get_dataset_size() < 10
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} ------------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} ------------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter < 10


def test_cv_minddataset_reader_two_dataset(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    if os.path.exists(CV1_FILE_NAME):
        os.remove(CV1_FILE_NAME)
    if os.path.exists("{}.db".format(CV1_FILE_NAME)):
        os.remove("{}.db".format(CV1_FILE_NAME))
    if os.path.exists(CV2_FILE_NAME):
        os.remove(CV2_FILE_NAME)
    if os.path.exists("{}.db".format(CV2_FILE_NAME)):
        os.remove("{}.db".format(CV2_FILE_NAME))
    writer = FileWriter(CV1_FILE_NAME, 1)
    data = get_data(CV_DIR_NAME)
    cv_schema_json = {"id": {"type": "int32"},
                      "file_name": {"type": "string"},
                      "label": {"type": "int32"},
                      "data": {"type": "bytes"}}
    writer.add_schema(cv_schema_json, "CV1_schema")
    writer.add_index(["file_name", "label"])
    writer.write_raw_data(data)
    writer.commit()

    writer = FileWriter(CV2_FILE_NAME, 1)
    data = get_data(CV_DIR_NAME)
    cv_schema_json = {"id": {"type": "int32"},
                      "file_name": {"type": "string"},
                      "label": {"type": "int32"},
                      "data": {"type": "bytes"}}
    writer.add_schema(cv_schema_json, "CV2_schema")
    writer.add_index(["file_name", "label"])
    writer.write_raw_data(data)
    writer.commit()
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset([CV_FILE_NAME + str(x) for x in range(FILES_NUM)] + [CV1_FILE_NAME, CV2_FILE_NAME],
                              columns_list, num_readers)
    assert data_set.get_dataset_size() == 30
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} ------------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} ------------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter == 30
    if os.path.exists(CV1_FILE_NAME):
        os.remove(CV1_FILE_NAME)
    if os.path.exists("{}.db".format(CV1_FILE_NAME)):
        os.remove("{}.db".format(CV1_FILE_NAME))
    if os.path.exists(CV2_FILE_NAME):
        os.remove(CV2_FILE_NAME)
    if os.path.exists("{}.db".format(CV2_FILE_NAME)):
        os.remove("{}.db".format(CV2_FILE_NAME))


def test_cv_minddataset_reader_two_dataset_partition(add_and_remove_cv_file):
    paths = ["{}{}".format(CV1_FILE_NAME, str(x).rjust(1, '0'))
             for x in range(FILES_NUM)]
    for x in paths:
        os.remove("{}".format(x)) if os.path.exists("{}".format(x)) else None
        os.remove("{}.db".format(x)) if os.path.exists(
            "{}.db".format(x)) else None
    writer = FileWriter(CV1_FILE_NAME, FILES_NUM)
    data = get_data(CV_DIR_NAME)
    cv_schema_json = {"id": {"type": "int32"},
                      "file_name": {"type": "string"},
                      "label": {"type": "int32"},
                      "data": {"type": "bytes"}}
    writer.add_schema(cv_schema_json, "CV1_schema")
    writer.add_index(["file_name", "label"])
    writer.write_raw_data(data)
    writer.commit()

    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset([CV_FILE_NAME + str(x) for x in range(2)] + [CV1_FILE_NAME + str(x) for x in range(2, 4)],
                              columns_list, num_readers)
    assert data_set.get_dataset_size() < 20
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} ------------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} ------------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter < 20
    for x in paths:
        os.remove("{}".format(x))
        os.remove("{}.db".format(x))


def test_cv_minddataset_reader_basic_tutorial(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)
    assert data_set.get_dataset_size() == 10
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} ------------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} ------------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter == 10


def test_nlp_minddataset_reader_basic_tutorial(add_and_remove_nlp_file):
    """tutorial for nlp minderdataset."""
    num_readers = 4
    data_set = ds.MindDataset(NLP_FILE_NAME + "0", None, num_readers)
    assert data_set.get_dataset_size() == 10
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- num_iter: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- item[id]: {} ------------------------".format(item["id"]))
        logger.info(
            "-------------- item[rating]: {} --------------------".format(item["rating"]))
        logger.info("-------------- item[input_ids]: {}, shape: {} -----------------".format(
            item["input_ids"], item["input_ids"].shape))
        logger.info("-------------- item[input_mask]: {}, shape: {} -----------------".format(
            item["input_mask"], item["input_mask"].shape))
        logger.info("-------------- item[segment_ids]: {}, shape: {} -----------------".format(
            item["segment_ids"], item["segment_ids"].shape))
        assert item["input_ids"].shape == (50,)
        assert item["input_mask"].shape == (1, 50)
        assert item["segment_ids"].shape == (2, 25)
        num_iter += 1
    assert num_iter == 10


def test_cv_minddataset_reader_basic_tutorial_5_epoch(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)
    assert data_set.get_dataset_size() == 10
    for epoch in range(5):
        num_iter = 0
        for data in data_set:
            logger.info("data is {}".format(data))
            num_iter += 1
        assert num_iter == 10

        data_set.reset()


def test_cv_minddataset_reader_basic_tutorial_5_epoch_with_batch(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)

    resize_height = 32
    resize_width = 32

    # define map operations
    decode_op = vision.Decode()
    resize_op = vision.Resize(
        (resize_height, resize_width), ds.transforms.vision.Inter.LINEAR)

    data_set = data_set.map(
        input_columns=["data"], operations=decode_op, num_parallel_workers=4)
    data_set = data_set.map(
        input_columns=["data"], operations=resize_op, num_parallel_workers=4)

    data_set = data_set.batch(2)
    assert data_set.get_dataset_size() == 5
    for epoch in range(5):
        num_iter = 0
        for data in data_set:
            logger.info("data is {}".format(data))
            num_iter += 1
        assert num_iter == 5

        data_set.reset()


def test_cv_minddataset_reader_no_columns(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    data_set = ds.MindDataset(CV_FILE_NAME + "0")
    assert data_set.get_dataset_size() == 10
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- cv reader basic: {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} ------------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} -----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} ------------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ----------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter == 10


def test_cv_minddataset_reader_repeat_tutorial(add_and_remove_cv_file):
    """tutorial for cv minderdataset."""
    columns_list = ["data", "file_name", "label"]
    num_readers = 4
    data_set = ds.MindDataset(CV_FILE_NAME + "0", columns_list, num_readers)
    repeat_num = 2
    data_set = data_set.repeat(repeat_num)
    num_iter = 0
    for item in data_set.create_dict_iterator():
        logger.info(
            "-------------- repeat two test {} ------------------------".format(num_iter))
        logger.info(
            "-------------- len(item[data]): {} -----------------------".format(len(item["data"])))
        logger.info(
            "-------------- item[data]: {} ----------------------------".format(item["data"]))
        logger.info(
            "-------------- item[file_name]: {} -----------------------".format(item["file_name"]))
        logger.info(
            "-------------- item[label]: {} ---------------------------".format(item["label"]))
        num_iter += 1
    assert num_iter == 20


def get_data(dir_name):
    """
    usage: get data from imagenet dataset
    params:
    dir_name: directory containing folder images and annotation information

    """
    if not os.path.isdir(dir_name):
        raise IOError("Directory {} not exists".format(dir_name))
    img_dir = os.path.join(dir_name, "images")
    ann_file = os.path.join(dir_name, "annotation.txt")
    with open(ann_file, "r") as file_reader:
        lines = file_reader.readlines()

    data_list = []
    for i, line in enumerate(lines):
        try:
            filename, label = line.split(",")
            label = label.strip("\n")
            with open(os.path.join(img_dir, filename), "rb") as file_reader:
                img = file_reader.read()
            data_json = {"id": i,
                         "file_name": filename,
                         "data": img,
                         "label": int(label)}
            data_list.append(data_json)
        except FileNotFoundError:
            continue
    return data_list


def get_multi_bytes_data(file_name, bytes_num=3):
    """
    Return raw data of multi-bytes dataset.

    Args:
        file_name (str): String of multi-bytes dataset's path.
        bytes_num (int): Number of bytes fields.

    Returns:
       List
    """
    if not os.path.exists(file_name):
        raise IOError("map file {} not exists".format(file_name))
    dir_name = os.path.dirname(file_name)
    with open(file_name, "r") as file_reader:
        lines = file_reader.readlines()
    data_list = []
    row_num = 0
    for line in lines:
        try:
            img10_path = line.strip('\n').split(" ")
            img5 = []
            for path in img10_path[:bytes_num]:
                with open(os.path.join(dir_name, path), "rb") as file_reader:
                    img5 += [file_reader.read()]
            data_json = {"image_{}".format(i): img5[i]
                         for i in range(len(img5))}
            data_json.update({"id": row_num})
            row_num += 1
            data_list.append(data_json)
        except FileNotFoundError:
            continue
    return data_list


def get_mkv_data(dir_name):
    """
    Return raw data of Vehicle_and_Person dataset.

    Args:
        dir_name (str): String of Vehicle_and_Person dataset's path.

    Returns:
        List
    """
    if not os.path.isdir(dir_name):
        raise IOError("Directory {} not exists".format(dir_name))
    img_dir = os.path.join(dir_name, "Image")
    label_dir = os.path.join(dir_name, "prelabel")

    data_list = []
    file_list = os.listdir(label_dir)

    index = 1
    for item in file_list:
        if os.path.splitext(item)[1] == '.json':
            file_path = os.path.join(label_dir, item)

            image_name = ''.join([os.path.splitext(item)[0], ".jpg"])
            image_path = os.path.join(img_dir, image_name)

            with open(file_path, "r") as load_f:
                load_dict = json.load(load_f)

            if os.path.exists(image_path):
                with open(image_path, "rb") as file_reader:
                    img = file_reader.read()
                data_json = {"file_name": image_name,
                             "prelabel": str(load_dict),
                             "data": img,
                             "id": index}
                data_list.append(data_json)
            index += 1
    logger.info('{} images are missing'.format(
        len(file_list) - len(data_list)))
    return data_list


def get_nlp_data(dir_name, vocab_file, num):
    """
    Return raw data of aclImdb dataset.

    Args:
        dir_name (str): String of aclImdb dataset's path.
        vocab_file (str): String of dictionary's path.
        num (int): Number of sample.

    Returns:
        List
    """
    if not os.path.isdir(dir_name):
        raise IOError("Directory {} not exists".format(dir_name))
    for root, dirs, files in os.walk(dir_name):
        for index, file_name_extension in enumerate(files):
            if index < num:
                file_path = os.path.join(root, file_name_extension)
                file_name, _ = file_name_extension.split('.', 1)
                id_, rating = file_name.split('_', 1)
                with open(file_path, 'r') as f:
                    raw_content = f.read()

                dictionary = load_vocab(vocab_file)
                vectors = [dictionary.get('[CLS]')]
                vectors += [dictionary.get(i) if i in dictionary
                            else dictionary.get('[UNK]')
                            for i in re.findall(r"[\w']+|[{}]"
                                                .format(string.punctuation),
                                                raw_content)]
                vectors += [dictionary.get('[SEP]')]
                input_, mask, segment = inputs(vectors)
                input_ids = np.reshape(np.array(input_), [-1])
                input_mask = np.reshape(np.array(mask), [1, -1])
                segment_ids = np.reshape(np.array(segment), [2, -1])
                data = {
                    "label": 1,
                    "id": id_,
                    "rating": float(rating),
                    "input_ids": input_ids,
                    "input_mask": input_mask,
                    "segment_ids": segment_ids
                }
                yield data


def convert_to_uni(text):
    if isinstance(text, str):
        return text
    if isinstance(text, bytes):
        return text.decode('utf-8', 'ignore')
    raise Exception("The type %s does not convert!" % type(text))


def load_vocab(vocab_file):
    """load vocabulary to translate statement."""
    vocab = collections.OrderedDict()
    vocab.setdefault('blank', 2)
    index = 0
    with open(vocab_file) as reader:
        while True:
            tmp = reader.readline()
            if not tmp:
                break
            token = convert_to_uni(tmp)
            token = token.strip()
            vocab[token] = index
            index += 1
    return vocab


def inputs(vectors, maxlen=50):
    length = len(vectors)
    if length > maxlen:
        return vectors[0:maxlen], [1] * maxlen, [0] * maxlen
    input_ = vectors + [0] * (maxlen - length)
    mask = [1] * length + [0] * (maxlen - length)
    segment = [0] * maxlen
    return input_, mask, segment


def test_write_with_multi_bytes_and_array_and_read_by_MindDataset():
    mindrecord_file_name = "test.mindrecord"
    if os.path.exists("{}".format(mindrecord_file_name)):
        os.remove("{}".format(mindrecord_file_name))
    if os.path.exists("{}.db".format(mindrecord_file_name)):
        os.remove("{}.db".format(x))
    data = [{"file_name": "001.jpg", "label": 4,
             "image1": bytes("image1 bytes abc", encoding='UTF-8'),
             "image2": bytes("image1 bytes def", encoding='UTF-8'),
             "source_sos_ids": np.array([1, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([6, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "image3": bytes("image1 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image1 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image1 bytes mno", encoding='UTF-8'),
             "target_sos_ids": np.array([28, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([33, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([39, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([48, 49, 50, 51], dtype=np.int64)},
            {"file_name": "002.jpg", "label": 5,
             "image1": bytes("image2 bytes abc", encoding='UTF-8'),
             "image2": bytes("image2 bytes def", encoding='UTF-8'),
             "image3": bytes("image2 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image2 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image2 bytes mno", encoding='UTF-8'),
             "source_sos_ids": np.array([11, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([16, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "target_sos_ids": np.array([128, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([133, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([139, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([148, 49, 50, 51], dtype=np.int64)},
            {"file_name": "003.jpg", "label": 6,
             "source_sos_ids": np.array([21, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([26, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "target_sos_ids": np.array([228, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([233, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([239, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "image1": bytes("image3 bytes abc", encoding='UTF-8'),
             "image2": bytes("image3 bytes def", encoding='UTF-8'),
             "image3": bytes("image3 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image3 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image3 bytes mno", encoding='UTF-8'),
             "target_eos_mask": np.array([248, 49, 50, 51], dtype=np.int64)},
            {"file_name": "004.jpg", "label": 7,
             "source_sos_ids": np.array([31, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([36, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "image1": bytes("image4 bytes abc", encoding='UTF-8'),
             "image2": bytes("image4 bytes def", encoding='UTF-8'),
             "image3": bytes("image4 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image4 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image4 bytes mno", encoding='UTF-8'),
             "target_sos_ids": np.array([328, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([333, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([339, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([348, 49, 50, 51], dtype=np.int64)},
            {"file_name": "005.jpg", "label": 8,
             "source_sos_ids": np.array([41, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([46, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "target_sos_ids": np.array([428, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([433, 34, 35, 36, 37, 38], dtype=np.int64),
             "image1": bytes("image5 bytes abc", encoding='UTF-8'),
             "image2": bytes("image5 bytes def", encoding='UTF-8'),
             "image3": bytes("image5 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image5 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image5 bytes mno", encoding='UTF-8'),
             "target_eos_ids": np.array([439, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([448, 49, 50, 51], dtype=np.int64)},
            {"file_name": "006.jpg", "label": 9,
             "source_sos_ids": np.array([51, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([56, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "target_sos_ids": np.array([528, 29, 30, 31, 32], dtype=np.int64),
             "image1": bytes("image6 bytes abc", encoding='UTF-8'),
             "image2": bytes("image6 bytes def", encoding='UTF-8'),
             "image3": bytes("image6 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image6 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image6 bytes mno", encoding='UTF-8'),
             "target_sos_mask": np.array([533, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([539, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([548, 49, 50, 51], dtype=np.int64)}
            ]

    writer = FileWriter(mindrecord_file_name)
    schema = {"file_name": {"type": "string"},
              "image1": {"type": "bytes"},
              "image2": {"type": "bytes"},
              "source_sos_ids": {"type": "int64", "shape": [-1]},
              "source_sos_mask": {"type": "int64", "shape": [-1]},
              "image3": {"type": "bytes"},
              "image4": {"type": "bytes"},
              "image5": {"type": "bytes"},
              "target_sos_ids": {"type": "int64", "shape": [-1]},
              "target_sos_mask": {"type": "int64", "shape": [-1]},
              "target_eos_ids": {"type": "int64", "shape": [-1]},
              "target_eos_mask": {"type": "int64", "shape": [-1]},
              "label": {"type": "int32"}}
    writer.add_schema(schema, "data is so cool")
    writer.write_raw_data(data)
    writer.commit()

    # change data value to list
    data_value_to_list = []
    for item in data:
        new_data = {}
        new_data['file_name'] = np.asarray(
            list(bytes(item["file_name"], encoding='utf-8')), dtype=np.uint8)
        new_data['label'] = np.asarray(list([item["label"]]), dtype=np.int32)
        new_data['image1'] = np.asarray(list(item["image1"]), dtype=np.uint8)
        new_data['image2'] = np.asarray(list(item["image2"]), dtype=np.uint8)
        new_data['image3'] = np.asarray(list(item["image3"]), dtype=np.uint8)
        new_data['image4'] = np.asarray(list(item["image4"]), dtype=np.uint8)
        new_data['image5'] = np.asarray(list(item["image5"]), dtype=np.uint8)
        new_data['source_sos_ids'] = item["source_sos_ids"]
        new_data['source_sos_mask'] = item["source_sos_mask"]
        new_data['target_sos_ids'] = item["target_sos_ids"]
        new_data['target_sos_mask'] = item["target_sos_mask"]
        new_data['target_eos_ids'] = item["target_eos_ids"]
        new_data['target_eos_mask'] = item["target_eos_mask"]
        data_value_to_list.append(new_data)

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 13
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["source_sos_ids",
                                            "source_sos_mask", "target_sos_ids"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 3
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] == data[num_iter][field]).all()
            else:
                assert item[field] == data[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 1
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=[
                                  "image2", "source_sos_mask", "image3", "target_sos_ids"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 4
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 3
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["target_sos_ids",
                                            "image4", "source_sos_ids"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 3
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 3
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["target_sos_ids", "image5",
                                            "image4", "image3", "source_sos_ids"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 5
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 1
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["target_eos_mask", "image5",
                                            "image2", "source_sos_mask", "label"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 5
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["label", "target_eos_mask", "image1", "target_eos_ids", "source_sos_mask",
                                            "image2", "image4", "image3", "source_sos_ids", "image5", "file_name"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 11
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    os.remove("{}".format(mindrecord_file_name))
    os.remove("{}.db".format(mindrecord_file_name))


def test_write_with_multi_bytes_and_MindDataset():
    mindrecord_file_name = "test.mindrecord"
    data = [{"file_name": "001.jpg", "label": 43,
             "image1": bytes("image1 bytes abc", encoding='UTF-8'),
             "image2": bytes("image1 bytes def", encoding='UTF-8'),
             "image3": bytes("image1 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image1 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image1 bytes mno", encoding='UTF-8')},
            {"file_name": "002.jpg", "label": 91,
             "image1": bytes("image2 bytes abc", encoding='UTF-8'),
             "image2": bytes("image2 bytes def", encoding='UTF-8'),
             "image3": bytes("image2 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image2 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image2 bytes mno", encoding='UTF-8')},
            {"file_name": "003.jpg", "label": 61,
             "image1": bytes("image3 bytes abc", encoding='UTF-8'),
             "image2": bytes("image3 bytes def", encoding='UTF-8'),
             "image3": bytes("image3 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image3 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image3 bytes mno", encoding='UTF-8')},
            {"file_name": "004.jpg", "label": 29,
             "image1": bytes("image4 bytes abc", encoding='UTF-8'),
             "image2": bytes("image4 bytes def", encoding='UTF-8'),
             "image3": bytes("image4 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image4 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image4 bytes mno", encoding='UTF-8')},
            {"file_name": "005.jpg", "label": 78,
             "image1": bytes("image5 bytes abc", encoding='UTF-8'),
             "image2": bytes("image5 bytes def", encoding='UTF-8'),
             "image3": bytes("image5 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image5 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image5 bytes mno", encoding='UTF-8')},
            {"file_name": "006.jpg", "label": 37,
             "image1": bytes("image6 bytes abc", encoding='UTF-8'),
             "image2": bytes("image6 bytes def", encoding='UTF-8'),
             "image3": bytes("image6 bytes ghi", encoding='UTF-8'),
             "image4": bytes("image6 bytes jkl", encoding='UTF-8'),
             "image5": bytes("image6 bytes mno", encoding='UTF-8')}
            ]
    writer = FileWriter(mindrecord_file_name)
    schema = {"file_name": {"type": "string"},
              "image1": {"type": "bytes"},
              "image2": {"type": "bytes"},
              "image3": {"type": "bytes"},
              "label": {"type": "int32"},
              "image4": {"type": "bytes"},
              "image5": {"type": "bytes"}}
    writer.add_schema(schema, "data is so cool")
    writer.write_raw_data(data)
    writer.commit()

    # change data value to list
    data_value_to_list = []
    for item in data:
        new_data = {}
        new_data['file_name'] = np.asarray(
            list(bytes(item["file_name"], encoding='utf-8')), dtype=np.uint8)
        new_data['label'] = np.asarray(list([item["label"]]), dtype=np.int32)
        new_data['image1'] = np.asarray(list(item["image1"]), dtype=np.uint8)
        new_data['image2'] = np.asarray(list(item["image2"]), dtype=np.uint8)
        new_data['image3'] = np.asarray(list(item["image3"]), dtype=np.uint8)
        new_data['image4'] = np.asarray(list(item["image4"]), dtype=np.uint8)
        new_data['image5'] = np.asarray(list(item["image5"]), dtype=np.uint8)
        data_value_to_list.append(new_data)

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 7
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["image1", "image2", "image5"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 3
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["image2", "image4"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 2
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["image5", "image2"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 2
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["image5", "image2", "label"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 3
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["image4", "image5",
                                            "image2", "image3", "file_name"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 5
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    os.remove("{}".format(mindrecord_file_name))
    os.remove("{}.db".format(mindrecord_file_name))


def test_write_with_multi_array_and_MindDataset():
    mindrecord_file_name = "test.mindrecord"
    data = [{"source_sos_ids": np.array([1, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([6, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "source_eos_ids": np.array([13, 14, 15, 16, 17, 18], dtype=np.int64),
             "source_eos_mask": np.array([19, 20, 21, 22, 23, 24, 25, 26, 27], dtype=np.int64),
             "target_sos_ids": np.array([28, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([33, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([39, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([48, 49, 50, 51], dtype=np.int64)},
            {"source_sos_ids": np.array([11, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([16, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "source_eos_ids": np.array([113, 14, 15, 16, 17, 18], dtype=np.int64),
             "source_eos_mask": np.array([119, 20, 21, 22, 23, 24, 25, 26, 27], dtype=np.int64),
             "target_sos_ids": np.array([128, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([133, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([139, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([148, 49, 50, 51], dtype=np.int64)},
            {"source_sos_ids": np.array([21, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([26, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "source_eos_ids": np.array([213, 14, 15, 16, 17, 18], dtype=np.int64),
             "source_eos_mask": np.array([219, 20, 21, 22, 23, 24, 25, 26, 27], dtype=np.int64),
             "target_sos_ids": np.array([228, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([233, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([239, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([248, 49, 50, 51], dtype=np.int64)},
            {"source_sos_ids": np.array([31, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([36, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "source_eos_ids": np.array([313, 14, 15, 16, 17, 18], dtype=np.int64),
             "source_eos_mask": np.array([319, 20, 21, 22, 23, 24, 25, 26, 27], dtype=np.int64),
             "target_sos_ids": np.array([328, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([333, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([339, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([348, 49, 50, 51], dtype=np.int64)},
            {"source_sos_ids": np.array([41, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([46, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "source_eos_ids": np.array([413, 14, 15, 16, 17, 18], dtype=np.int64),
             "source_eos_mask": np.array([419, 20, 21, 22, 23, 24, 25, 26, 27], dtype=np.int64),
             "target_sos_ids": np.array([428, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([433, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([439, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([448, 49, 50, 51], dtype=np.int64)},
            {"source_sos_ids": np.array([51, 2, 3, 4, 5], dtype=np.int64),
             "source_sos_mask": np.array([56, 7, 8, 9, 10, 11, 12], dtype=np.int64),
             "source_eos_ids": np.array([513, 14, 15, 16, 17, 18], dtype=np.int64),
             "source_eos_mask": np.array([519, 20, 21, 22, 23, 24, 25, 26, 27], dtype=np.int64),
             "target_sos_ids": np.array([528, 29, 30, 31, 32], dtype=np.int64),
             "target_sos_mask": np.array([533, 34, 35, 36, 37, 38], dtype=np.int64),
             "target_eos_ids": np.array([539, 40, 41, 42, 43, 44, 45, 46, 47], dtype=np.int64),
             "target_eos_mask": np.array([548, 49, 50, 51], dtype=np.int64)}
            ]
    writer = FileWriter(mindrecord_file_name)
    schema = {"source_sos_ids": {"type": "int64", "shape": [-1]},
              "source_sos_mask": {"type": "int64", "shape": [-1]},
              "source_eos_ids": {"type": "int64", "shape": [-1]},
              "source_eos_mask": {"type": "int64", "shape": [-1]},
              "target_sos_ids": {"type": "int64", "shape": [-1]},
              "target_sos_mask": {"type": "int64", "shape": [-1]},
              "target_eos_ids": {"type": "int64", "shape": [-1]},
              "target_eos_mask": {"type": "int64", "shape": [-1]}}
    writer.add_schema(schema, "data is so cool")
    writer.write_raw_data(data)
    writer.commit()

    # change data value to list - do none
    data_value_to_list = []
    for item in data:
        new_data = {}
        new_data['source_sos_ids'] = item["source_sos_ids"]
        new_data['source_sos_mask'] = item["source_sos_mask"]
        new_data['source_eos_ids'] = item["source_eos_ids"]
        new_data['source_eos_mask'] = item["source_eos_mask"]
        new_data['target_sos_ids'] = item["target_sos_ids"]
        new_data['target_sos_mask'] = item["target_sos_mask"]
        new_data['target_eos_ids'] = item["target_eos_ids"]
        new_data['target_eos_mask'] = item["target_eos_mask"]
        data_value_to_list.append(new_data)

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 8
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["source_eos_ids", "source_eos_mask",
                                            "target_sos_ids", "target_sos_mask",
                                            "target_eos_ids", "target_eos_mask"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 6
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["source_sos_ids",
                                            "target_sos_ids",
                                            "target_eos_mask"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 3
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["target_eos_mask",
                                            "source_eos_mask",
                                            "source_sos_mask"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 3
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 2
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["target_eos_ids"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 1
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    num_readers = 1
    data_set = ds.MindDataset(dataset_file=mindrecord_file_name,
                              columns_list=["target_eos_mask", "target_eos_ids",
                                            "target_sos_mask", "target_sos_ids",
                                            "source_eos_mask", "source_eos_ids",
                                            "source_sos_mask", "source_sos_ids"],
                              num_parallel_workers=num_readers,
                              shuffle=False)
    assert data_set.get_dataset_size() == 6
    num_iter = 0
    for item in data_set.create_dict_iterator():
        assert len(item) == 8
        for field in item:
            if isinstance(item[field], np.ndarray):
                assert (item[field] ==
                        data_value_to_list[num_iter][field]).all()
            else:
                assert item[field] == data_value_to_list[num_iter][field]
        num_iter += 1
    assert num_iter == 6

    os.remove("{}".format(mindrecord_file_name))
    os.remove("{}.db".format(mindrecord_file_name))