# libtmux.Server.attach_session

- **Module:** libtmux.Server
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/9fdd083a8181a827889337b63cd4e6daea661a8c/src/libtmux/server.py#L2183
- **Page:** https://libtmux.org/en/py/latest/reference/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`