openvolley/py-datavolley

AI Summary: This issue requests the relocation of two functions, `dv_index2xy` and `add_xy`, from `datavolley/helpers.py` to `datavolley/core/coordinates.py`. Additionally, these functions need to be exposed via `datavolley/__init__.py` for package-level access. The task includes testing the changes using `example_match.dvw` to ensure functionality is preserved.

AI Summary: A user has noticed the `pydatavolley` library is being rebuilt and expresses enthusiasm to contribute. They previously encountered deprecation warnings and errors with the old version, which motivates their interest in the new project. The user is actively seeking guidance on how they can help with the development.