# libtmux.Server.attach_session

- **Module:** libtmux.Server
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/server.py#L2183
- **Page:** https://libtmux.org/reference/py/libtmux-server-attach_session/

```
libtmux.Server.attach_session(self, target_session: str | None = None) -> None
```

Attach tmux session.

## Parameters

- `self`
- `target_session` (str | None) — name of the session. fnmatch(3) works.

## Raises

- `exc.BadSessionName`