# libtmux.common.EnvironmentMixin.__init__

- **Module:** libtmux.common.EnvironmentMixin
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/common.py#L61
- **Page:** https://libtmux.org/reference/py/libtmux-common-environmentmixin-__init__/

```
libtmux.common.EnvironmentMixin.__init__(self, add_option: str | None = None) -> None
```