mindspore.dataset.IWSLT2016Dataset

class mindspore.dataset.IWSLT2016Dataset(dataset_dir, usage=None, language_pair=None, valid_set=None, test_set=None, num_samples=None, shuffle=Shuffle.GLOBAL, num_shards=None, shard_id=None, num_parallel_workers=None, cache=None)[source]

A source dataset that reads and parses IWSLT2016 datasets.

The generated dataset has two columns: [text, translation] . The tensor of column :py:obj: text is of the string type. The column :py:obj: translation is of the string type.

Parameters

dataset_dir (str) – Path to the root directory that contains the dataset.
usage (str, optional) – Acceptable usages include ‘train’, ‘valid’, ‘test’ and ‘all’. Default: None, all samples.
language_pair (sequence, optional) – Sequence containing source and target language, supported values are (‘en’, ‘fr’), (‘en’, ‘de’), (‘en’, ‘cs’), (‘en’, ‘ar’), (‘fr’, ‘en’), (‘de’, ‘en’), (‘cs’, ‘en’), (‘ar’, ‘en’). Default: (‘de’, ‘en’).
valid_set (str, optional) – A string to identify validation set, when usage is valid or all, the validation set of valid_set type will be read, supported values are ‘dev2010’, ‘tst2010’, ‘tst2011’, ‘tst2012’, ‘tst2013’ and ‘tst2014’. Default: ‘tst2013’.
test_set (str, optional) – A string to identify test set, when usage is test or all, the test set of test_set type will be read, supported values are ‘dev2010’, ‘tst2010’, ‘tst2011’, ‘tst2012’, ‘tst2013’ and ‘tst2014’. Default: ‘tst2014’.
num_samples (int, optional) – Number of samples (rows) to read. Default: None, reads the full dataset.
shuffle (Union[bool, Shuffle], optional) –
Perform reshuffling of the data every epoch. Bool type and Shuffle enum are both supported to pass in. Default: Shuffle.GLOBAL . If shuffle is False, no shuffling will be performed. If shuffle is True, it is equivalent to setting shuffle to mindspore.dataset.Shuffle.GLOBAL. Set the mode of data shuffling by passing in enumeration variables:
- Shuffle.GLOBAL: Shuffle both the files and samples.
- Shuffle.FILES: Shuffle files only.
num_shards (int, optional) – Number of shards that the dataset will be divided into. Default: None. When this argument is specified, num_samples reflects the max sample number of per shard.
shard_id (int, optional) – The shard ID within num_shards . Default: None. This argument can only be specified when num_shards is also specified.
num_parallel_workers (int, optional) – Number of workers to read the data. Default: None, number set in the mindspore.dataset.config.
cache (DatasetCache, optional) – Use tensor caching service to speed up dataset processing. More details: Single-Node Data Cache . Default: None, which means no cache is used.

Raises

RuntimeError – If dataset_dir does not contain data files.
RuntimeError – If num_shards is specified but shard_id is None.
RuntimeError – If shard_id is specified but num_shards is None.
ValueError – If num_parallel_workers exceeds the max thread numbers.

Examples

>>> iwslt2016_dataset_dir = "/path/to/iwslt2016_dataset_dir"
>>> dataset = ds.IWSLT2016Dataset(dataset_dir=iwslt2016_dataset_dir, usage='all',
...                               language_pair=('de', 'en'), valid_set='tst2013', test_set='tst2014')

About IWSLT2016 dataset:

IWSLT is an international oral translation conference, a major annual scientific conference dedicated to all aspects of oral translation. The MT task of the IWSLT evaluation activity constitutes a dataset, which can be publicly obtained through the WIT3 website wit3 . The IWSLT2016 dataset includes translations from English to Arabic, Czech, French, and German, and translations from Arabic, Czech, French, and German to English.

You can unzip the original IWSLT2016 dataset files into this directory structure and read by MindSpore’s API. After decompression, you also need to decompress the dataset to be read in the specified folder. For example, if you want to read the dataset of de-en, you need to unzip the tgz file in the de/en directory, the dataset is in the unzipped folder.

.
└── iwslt2016_dataset_directory
     ├── subeval_files
     └── texts
          ├── ar
          │    └── en
          │        └── ar-en
          ├── cs
          │    └── en
          │        └── cs-en
          ├── de
          │    └── en
          │        └── de-en
          │            ├── IWSLT16.TED.dev2010.de-en.de.xml
          │            ├── train.tags.de-en.de
          │            ├── ...
          ├── en
          │    ├── ar
          │    │   └── en-ar
          │    ├── cs
          │    │   └── en-cs
          │    ├── de
          │    │   └── en-de
          │    └── fr
          │        └── en-fr
          └── fr
               └── en
                   └── fr-en

Citation:

@inproceedings{cettoloEtAl:EAMT2012,
Address = {Trento, Italy},
Author = {Mauro Cettolo and Christian Girardi and Marcello Federico},
Booktitle = {Proceedings of the 16$^{th}$ Conference of the European Association for Machine Translation
             (EAMT)},
Date = {28-30},
Month = {May},
Pages = {261--268},
Title = {WIT$^3$: Web Inventory of Transcribed and Translated Talks},
Year = {2012}}

Pre-processing Operation

`mindspore.dataset.Dataset.apply`	Apply a function in this dataset.
`mindspore.dataset.Dataset.concat`	Concatenate the dataset objects in the input list.
`mindspore.dataset.Dataset.filter`	Filter dataset by prediction.
`mindspore.dataset.Dataset.flat_map`	Map func to each row in dataset and flatten the result.
`mindspore.dataset.Dataset.map`	Apply each operation in operations to this dataset.
`mindspore.dataset.Dataset.project`	The specified columns will be selected from the dataset and passed into the pipeline with the order specified.
`mindspore.dataset.Dataset.rename`	Rename the columns in input datasets.
`mindspore.dataset.Dataset.repeat`	Repeat this dataset count times.
`mindspore.dataset.Dataset.reset`	Reset the dataset for next epoch.
`mindspore.dataset.Dataset.save`	Save the dynamic data processed by the dataset pipeline in common dataset format.
`mindspore.dataset.Dataset.shuffle`	Shuffle the dataset by creating a cache with the size of buffer_size .
`mindspore.dataset.Dataset.skip`	Skip the first N elements of this dataset.
`mindspore.dataset.Dataset.split`	Split the dataset into smaller, non-overlapping datasets.
`mindspore.dataset.Dataset.take`	Takes at most given numbers of elements from the dataset.
`mindspore.dataset.Dataset.zip`	Zip the datasets in the sense of input tuple of datasets.
`mindspore.dataset.TextBaseDataset.build_sentencepiece_vocab`	Function to create a SentencePieceVocab from source dataset.
`mindspore.dataset.TextBaseDataset.build_vocab`	Function to create a Vocab from source dataset.

Batch

`mindspore.dataset.Dataset.batch`	Combine batch_size number of consecutive rows into batch which apply per_batch_map to the samples first.
`mindspore.dataset.Dataset.bucket_batch_by_length`	Bucket elements according to their lengths.
`mindspore.dataset.Dataset.padded_batch`	Combine batch_size number of consecutive rows into batch which apply pad_info to the samples first.

Iterator

`mindspore.dataset.Dataset.create_dict_iterator`	Create an iterator over the dataset.
`mindspore.dataset.Dataset.create_tuple_iterator`	Create an iterator over the dataset.

Attribute

`mindspore.dataset.Dataset.get_batch_size`	Return the size of batch.
`mindspore.dataset.Dataset.get_class_indexing`	Return the class index.
`mindspore.dataset.Dataset.get_col_names`	Return the names of the columns in dataset.
`mindspore.dataset.Dataset.get_dataset_size`	Return the number of batches in an epoch.
`mindspore.dataset.Dataset.get_repeat_count`	Get the replication times in RepeatDataset.
`mindspore.dataset.Dataset.input_indexs`	Get the column index, which represents the corresponding relationship between the data column order and the network when using the sink mode.
`mindspore.dataset.Dataset.num_classes`	Get the number of classes in a dataset.
`mindspore.dataset.Dataset.output_shapes`	Get the shapes of output data.
`mindspore.dataset.Dataset.output_types`	Get the types of output data.

Apply Sampler

`mindspore.dataset.MappableDataset.add_sampler`	Add a child sampler for the current dataset.
`mindspore.dataset.MappableDataset.use_sampler`	Replace the last child sampler of the current dataset, remaining the parent sampler unchanged.

Others

`mindspore.dataset.Dataset.device_que`	Return a transferred Dataset that transfers data through a device.
`mindspore.dataset.Dataset.sync_update`	Release a blocking condition and trigger callback with given data.
`mindspore.dataset.Dataset.sync_wait`	Add a blocking condition to the input Dataset and a synchronize action will be applied.
`mindspore.dataset.Dataset.to_json`	Serialize a pipeline into JSON string and dump into file if filename is provided.