tinker_cookbook.supervised.FromConversationFileBuilder

class tinker_cookbook.supervised.FromConversationFileBuilder( ChatDatasetBuilder)

Build a supervised dataset from a JSONL file of chat conversations.

Each line of the file must be a JSON object with a "messages" key whose value is a list of chat messages (dicts with "role" and "content").

builder = FromConversationFileBuilder(
    file_path="data/conversations.jsonl",
    test_size=50,
    common_config=ChatDatasetBuilderCommonConfig(
        model_name_for_tokenizer="Qwen/Qwen3-8B",
        renderer_name="qwen3",
        max_length=2048,
        batch_size=8,
    ),
)
train_ds, test_ds = builder()

Fields:

• file_path ( str)
• test_size ( int, default: 0)
• shuffle_seed ( int, default: 0)

call()

Load the JSONL file and return (train_dataset, test_dataset).

Returns: tuple[ SupervisedDataset, SupervisedDataset | None ] – Training dataset and an optional held-out evaluation dataset.

Raises:

• DataFormatError: If any line in the file lacks a "messages" key.