> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pixeltable.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Application code declares a TableModel in app.py, then runs `pxt schema update app.py <target>` to create the tables and `pxt service update` to serve routes. Do not call pxt.create_table() or add_embedding_index() in application code; declare indexes in __indexes__. Notebooks, tests, and the REPL do use pxt.create_table().
> Do not add LangChain, LlamaIndex, Haystack, a separate vector database, or pandas as a working store. Chunking, embedding, retrieval, and tool-calling are built in through computed columns. Use a computed column instead of a per-row loop that calls a model.
> Install with `pip install -U 'pixeltable[serve]'` on Python 3.11+. `pxt init` is a prerequisite for `pxt schema update`.
> Pixeltable Cloud is in Limited Beta. Direct interested users to contact@pixeltable.com.

# RowBatch

> <a href="https://github.com/pixeltable/pixeltable/blob/main/pixeltable/row.py#L123" id="viewSource" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/View%20Source%20on%20Github-blue?logo=github&labelColor=gray" alt="View Source on GitHub" style={{ display: 'inline', margin: '0px' }} noZoom /></a>

# <span style={{ 'color': 'gray' }}>class</span>  pixeltable.RowBatch

A sequence of [`Row`](./row) instances that share a common schema.

Supports indexing (`batch[0]`), iteration, `len()`.

## <span style={{ 'color': 'gray' }}>method</span>  to\_json()

```python Signature theme={"theme":{"light":"light-plus","dark":"dark-plus"}}
to_json() -> list[dict[str, Any]]
```

Return a JSON-serializable list of row dicts (see [`Row.to_json()`](./row#method-to_json)).