In 3.13, the traceback includes:

Now you can write:

ZeroDivisionError: division by zero at divide (test.py:2) -> a=10, b=0 during call from <module> (test.py:4) For missing attributes, it suggests similar names from the local scope. For async / await mismatches, it shows the coroutine’s state. This is not just debugging — it is . The interpreter remembers the path it took and shows you footprints in the snow.

Consider:

The world in December 2025 is not the world of Python 2.7’s painful sunset, nor 3.0’s broken promises. It is a world where Python has become infrastructure — like electricity, like TCP/IP. You don’t cheer for it; you just expect it to work.