# libtmux.common.EnvironmentMixin.unset_environment

- **Module:** libtmux.common
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/38e368c11117fb4aeb2f082d552cd4f210eae06a/src/libtmux/common.py#L117
- **Page:** https://libtmux.org/en/py/stable/reference/libtmux-common-environmentmixin-unset_environment/

```
libtmux.common.EnvironmentMixin.unset_environment(
    self, name: str
) -> None
```

Unset environment variable [`$ tmux set-environment -u <name>`](/en/tmux/latest/manual/set-environment/).

## Parameters

- `name` (`str`): The environment variable name, e.g. 'PATH'.

## Raises

- [`ValueError`](https://docs.python.org/3/library/exceptions.html#ValueError): If tmux returns an error.