Function mindspore::dataset::TextFile

Function Documentation

inline std::shared_ptr<TextFileDataset> mindspore::dataset::TextFile(const std::vector<std::string> &dataset_files, int64_t num_samples = 0, ShuffleMode shuffle = ShuffleMode::kGlobal, int32_t num_shards = 1, int32_t shard_id = 0, const std::shared_ptr<DatasetCache> &cache = nullptr)

Function to create a TextFileDataset.

Note

The generated dataset has one column [‘text’].

Parameters

  • dataset_files – [in] List of files to be read to search for a pattern of files. The list will be sorted in a lexicographical order.

  • num_samples – [in] The number of samples to be included in the dataset (Default = 0 means all samples).

  • shuffle – [in] The mode for shuffling data every epoch (Default=ShuffleMode.kGlobal). Can be any of: ShuffleMode.kFalse - No shuffling is performed. ShuffleMode.kFiles - Shuffle files only. ShuffleMode.kGlobal - Shuffle both the files and samples.

  • num_shards – [in] Number of shards that the dataset should be divided into (Default = 1).

  • shard_id – [in] The shard ID within num_shards. This argument should be specified only when num_shards is also specified (Default = 0).

  • cache – [in] Tensor cache to use (default=nullptr which means no cache is used).

Returns

Shared pointer to the TextFileDataset.

样例
/* Define dataset path and MindData object */
std::string file_path = "/path/to/text_file_dataset_file";
std::shared_ptr<Dataset> ds = TextFile({file_path}, 2);

/* Create iterator to read dataset */
std::shared_ptr<Iterator> iter = ds->CreateIterator();
std::unordered_map<std::string, mindspore::MSTensor> row;
iter->GetNextRow(&row);

/* Note: In TextFile dataset, each dictionary has key "text" */
auto text = row["text"];