Worked on the apache/iceberg-python repository to enhance the robustness of the pyarrow_transforms module by introducing an import check for the optional dependency pyiceberg_core. This update focused on error handling in Python, ensuring that users receive clear and actionable error messages when attempting to use features requiring pyiceberg_core without having it installed. By preventing cryptic crashes, the change improved onboarding and stability for new users. The implementation included unit testing to verify the new behavior, reflecting a careful approach to dependency management and user experience. The work addressed a targeted need, delivering a focused feature within a short timeframe.