When building and maintaining larger Python codebases, one of the classic debates between senior engineers is balancing the DRY (Don't Repeat Yourself) principle against premature coupling.
Consider a situation where two or three separate modules have identical 10-line boilerplate (for example, database connection lifecycle handling, recurring input validation checks, or retry logic):
python # Seen across module_a.py and module_b.py: managed: bool = conn is None if managed: conn = init_db(DB_PATH) try: yield conn finally: if managed: conn.close() 
