# libtmux.Server.child_id_attribute

- **Module:** libtmux
- **Package:** libtmux
- **Language:** Python
- **Kind:** attribute
- **Source:** https://github.com/tmux-python/libtmux/blob/38e368c11117fb4aeb2f082d552cd4f210eae06a/src/libtmux/server.py#L158
- **Page:** https://libtmux.org/en/py/stable/reference/libtmux-server-child_id_attribute/

```py
libtmux.Server.child_id_attribute = "session_id"
```

Unique child ID used by :class:`~libtmux.common.TmuxRelationalObject`