Worked on improving asynchronous callback handling in the plotly/dash repository by updating internal checks to align with current Python standards. Addressed a bug by replacing the deprecated asyncio.iscoroutinefunction() with inspect.iscoroutinefunction(), ensuring compatibility with modern Python APIs and reducing the risk of deprecation warnings or runtime issues in future Python versions. Focused on maintaining user-facing behavior and API stability while enhancing the reliability and maintainability of the codebase. Utilized Python, Flask, and asynchronous programming techniques to implement these changes, ultimately streamlining future maintenance and supporting continued compatibility for Dash users across evolving Python environments.