Worked on enhancing the robustness of the Weaviate Python client by addressing error handling in filtering operations. Focused on backend and API development using Python, the work involved replacing generic IndexError exceptions with a more descriptive WeaviateInvalidInputError when empty filter lists were provided. This change improved the predictability and clarity of error semantics for client applications, preventing crashes and ensuring more reliable filtering behavior. The update, committed to the weaviate/weaviate-python-client repository, targeted multiple filter operations to handle invalid inputs gracefully. The approach emphasized precise error handling, contributing to a more stable and developer-friendly client library for Weaviate users.