3.11 ((hot)) - Python

ExceptionGroup and except* .

# Python 3.11+ from asyncio import gather, sleep async def risky_task(name, fail): await sleep(0.1) if fail: raise ValueError(f"name failed") return name

Python 3.11 fixes this. When an error occurs, the interpreter now points an arrow ( ^ ) at the specific expression that failed, not just the line number. python 3.11

import tomllib with open("config.toml", "rb") as f: config = tomllib.load(f) print(config["tool"]["poetry"]["name"])

Released in October 2022, Python 3.11 stands as a landmark update for the language. While the world has since moved to 3.12 and 3.13, 3.11 remains the bedrock for many production systems due to its maturity and significant, measurable improvements over Python 3.10. This update focused heavily on two core pillars: execution speed and error clarity . ExceptionGroup and except*

Python 3.11 adds tomllib to the standard library for reading TOML files.

If you are still on Python 3.8 or 3.9, here is why you should make the jump to 3.11 (or later). The headline feature of Python 3.11 is the result of Microsoft’s "Faster CPython" team, led by Mark Shannon. For years, Python developers accepted the trade-off of slower execution for rapid development speed. Python 3.11 narrowed that gap significantly. import tomllib with open("config

# Python 3.10 Traceback (most recent call last): File "calc.py", line 2, in <module> result = 100 / (50 - 50) ZeroDivisionError: division by zero Traceback (most recent call last): File "calc.py", line 2, in <module> result = 100 / (50 - 50) ~~~~^~~~~~~~~~~~ ZeroDivisionError: division by zero