# Installation

iiisight is a pure-Python library, so it installs as a single universal wheel on
any platform with Python 3.10 or newer:

```bash
pip install iiisight
```

Its only runtime dependency is [`httpx`](https://www.python-httpx.org/).

## Optional extras

| Extra | Installs | For |
|-------|----------|-----|
| `iiisight[prezi3]` | `iiif-prezi3` | Interop with the write-side iiif-prezi3 library |
| `iiisight[dev]` | pytest, ruff, build, … | Working on iiisight itself |
| `iiisight[docs]` | Sphinx, MyST, Furo | Building this documentation |

```bash
pip install "iiisight[prezi3]"
```

## Requirements

- **Python 3.10+** — iiisight uses modern typing (`X | None`, `list[str]`).
- No compiled extensions, no system libraries, no image-decoding dependency.

## Verifying the install

```python
import iiisight
print(iiisight.__version__)
```