Halo is a Python library that provides beautiful terminal spinners, offering visual feedback for long-running operations in command-line applications, IPython, and Jupyter. It is currently at version 0.0.31 and is actively maintained, though new releases are not frequent.
pip install haloVerified import paths — ran on the pinned version, not inferred.
The `Halo` class is the primary interface for creating and managing terminal spinners. It can be used directly with `start()` and `stop()` methods, as a context manager (using `with` statement), or as a decorator. The context manager approach is generally recommended for clean resource management.
No direct fix for users; requires library update. Monitor GitHub issues for resolution.
Avoid changing animated text to a significantly shorter string, or ensure animations are stopped before text changes, particularly if crashes are observed.
Initialize `Halo` with `spinner='dots'` (or another desired spinner) explicitly: `Halo(..., spinner='dots')`.
If leading spaces are critical, consider pre-padding the terminal output or using alternative methods for alignment rather than relying on `Halo`'s text parameter for leading spaces.
Test terminal output in your specific CI environment. Consider disabling spinners (`enabled=False`) in CI environments if display issues occur, or check for CI-specific configuration options.
Install the library using pip: `pip install halo`. If using a virtual environment, ensure it is activated before installation and execution.
While `halo` has some built-in compatibility, for robust spinner display in Jupyter, consider using libraries specifically designed for notebook environments like `tqdm.notebook` or implement custom `ipywidgets.Output` handling. The issue 'clean_up() takes 0 positional arguments' is a known bug with newer ipython versions (e.g., >8.16.1) and may require downgrading ipython or waiting for a fix in `halo`.
While `halo` attempts to detect support, a direct fix for all spinners on Windows is not always available due to fundamental terminal differences. Ensure your terminal emulator (e.g., Windows Terminal, VS Code integrated terminal) is up-to-date. For a consistent experience across platforms, stick to the default 'dots' or 'line' spinner if encountering issues, or consider using `halo` only in environments where full terminal support is expected.