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

# Install bunker-fold with pip

> Install the bunker-fold Python SDK with pip. Covers the install command, virtual environments, upgrades, and pinning to a specific release.

Use `pip` for the standard Python install path. Works on macOS, Linux, and Windows with Python 3.9 or later.

## Install

```bash theme={null}
pip install bunker-fold
```

## Install in a virtual environment

Isolate the SDK from your system Python:

```bash theme={null}
python -m venv .venv
source .venv/bin/activate   # Windows: .venv\Scripts\activate
pip install bunker-fold
```

## Pin a version

Lock to a specific release for reproducible builds:

```bash theme={null}
pip install "bunker-fold==1.4.2"
```

Or add it to `requirements.txt`:

```
bunker-fold==1.4.2
```

## Upgrade

```bash theme={null}
pip install --upgrade bunker-fold
```

## Uninstall

```bash theme={null}
pip uninstall bunker-fold
```

## Verify

```python theme={null}
import bunker_fold
print(bunker_fold.__version__)
```