# libtmux.Session.attach

- **Module:** libtmux.Session
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/9fdd083a8181a827889337b63cd4e6daea661a8c/src/libtmux/session.py#L633
- **Page:** https://libtmux.org/en/py/latest/reference/libtmux-session-attach/

```
libtmux.Session.attach(self, exit_: bool | None = None, flags_: list[str] | None = None) -> Session
```

Return ``$ tmux attach-session`` aka alias: ``$ tmux attach``.

## Example

```python
>>> session = server.new_session()
```

## Example

```python
>>> session not in server.attached_sessions
True
```