# tmuxp.workspace.builder.ClassicWorkspaceBuilder.session_exists

- **Module:** tmuxp.workspace.builder
- **Package:** tmuxp
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/tmuxp/blob/153acdf6ff1268b14d3d03ed488f545a7123c8f1/src/tmuxp/workspace/builder/classic.py#L418
- **Page:** https://libtmux.org/en/py/stable/workspace/reference/tmuxp-workspace-builder-classicworkspacebuilder-session_exists/

```
tmuxp.workspace.builder.ClassicWorkspaceBuilder.session_exists(
    self, session_name: str
) -> bool
```

Return true if tmux session already exists.

## Parameters

- `session_name` (`str`)