More importantly, tracebacks now use color by default in modern terminals, and syntax errors point to the exact token. In 2025, even beginners benefit from these refinements—code teaching platforms like Pyret and Replit have upgraded to 3.13 primarily for better error feedback. PEP 698’s @override decorator was simple but impactful. When used with mypy>=1.15 or pyright>=1.2.0 , it catches subtle refactoring bugs:
class Child(Parent): @override def grett(self): ... # mypy error: No parent method named 'grett' python 3.13 news december 2025
# Python 3.12: # NameError: name 'x' is not defined NameError: name 'x' is not defined. Did you mean 'xy'? More importantly, tracebacks now use color by default