@spec download([{:example_types, [train_sentiment()]}]) :: %{
  review: [binary(), ...],
  sentiment: [1 | 0 | nil]
}

Downloads the IMDB reviews training dataset or fetches it locally.

example_types specifies which examples in the dataset should be returned according to each example's label: :pos for positive examples, :neg for negative examples, and :unsup for unlabeled examples. If no example_types are provided, :pos and :neg examples are fetched.

options

Options.

• :base_url - Dataset base URL.

  Defaults to "http://ai.stanford.edu/~amaas/data/sentiment/"

• :dataset_file - Dataset filename.

  Defaults to "aclImdb_v1.tar.gz"

• :cache_dir - Cache directory.

  Defaults to System.tmp_dir!()

@spec download_test([{:example_types, [test_sentiment()]}]) :: %{
  review: [binary(), ...],
  sentiment: [1 | 0]
}

Downloads the IMDB reviews test dataset or fetches it locally.

example_types is the same as in download/1, but :unsup is unavailable because all unlabeled examples are in the training set.

Accepts the same options as download/1.