During June 2025, Li Jin focused on improving Python module integration within the pola-rs/pyo3 repository by addressing a subtle edge case in PyModule::from_code. Li enhanced the module’s reliability by ensuring that when an empty filename is provided, it defaults safely to "<string>", preventing issues with Python’s inspect.stack. This change was implemented in Rust, leveraging FFI and module management expertise. Li also expanded unit test coverage to validate the new behavior and updated documentation examples to guide future users. The work demonstrated careful attention to stability and developer experience, resulting in a more robust and predictable module construction process.