Worked on the apache/iceberg-python repository to enhance schema handling for the Iceberg Python client, focusing on robust data workflows. Developed a feature that improved the NestedField class to correctly process initial-default and write-default attributes when parsing Iceberg schema JSON files. Employed Python and data serialization techniques to implement these changes, ensuring that schema definitions are accurately interpreted and maintained. Added comprehensive unit tests to validate serialization and deserialization of NestedField objects, increasing reliability and correctness. This work strengthened test coverage and addressed potential edge cases, contributing to more dependable schema management within the Iceberg Python ecosystem over the month.