Worked on the RustPython/RustPython repository to enhance compatibility with CPython 3.12, focusing on exception handling within context managers. Addressed a complex bug by refining the contextlib module to ensure generators close properly during throw and athrow operations, aligning behavior with CPython standards. Improved the suppress utility to correctly process ExceptionGroups and their subsets, reducing edge cases for users managing intricate exception flows. Applied these changes using Python, leveraging expertise in context managers and exception handling. This work strengthened platform stability and interoperability with CPython libraries and tooling, providing a more reliable foundation for Python development within the RustPython project.