# ApprovalPreview

> **Class** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/file_ops/ApprovalPreview)

Data used to render HITL previews.

## Signature

```python
ApprovalPreview(
    self,
    title: str,
    details: list[str],
    diff: str | None = None,
    diff_title: str | None = None,
    error: str | None = None,
    stats: DiffStats | None = None,
    before: str | None = None,
    after: str | None = None,
)
```

## Constructors

```python
__init__(
    self,
    title: str,
    details: list[str],
    diff: str | None = None,
    diff_title: str | None = None,
    error: str | None = None,
    stats: DiffStats | None = None,
    before: str | None = None,
    after: str | None = None,
) -> None
```

| Name | Type |
|------|------|
| `title` | `str` |
| `details` | `list[str]` |
| `diff` | `str \| None` |
| `diff_title` | `str \| None` |
| `error` | `str \| None` |
| `stats` | `DiffStats \| None` |
| `before` | `str \| None` |
| `after` | `str \| None` |


## Properties

- `title`
- `details`
- `diff`
- `diff_title`
- `error`
- `stats`
- `before`
- `after`

---

[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/caaa7e7c12d214afa5cf0a1afed8eb6232aa6f7b/libs/code/deepagents_code/file_ops.py#L150)