# Copyright 2020 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.
# ============================================================================
"""create MindDataset by MindRecord"""
import mindspore.dataset as ds

def create_dataset(data_file):
    """create MindDataset"""
    num_readers = 4
    data_set = ds.MindDataset(dataset_file=data_file,
                              num_parallel_workers=num_readers,
                              shuffle=True)
    index = 0
    for item in data_set.create_dict_iterator():
        print("example {}: {}".format(index, item))
        index += 1
        if index % 1000 == 0:
            print(">> read rows: {}".format(index))
    print(">> total rows: {}".format(index))

if __name__ == '__main__':
    create_dataset('output/CUB_200_2011.mindrecord')
