Major new features of the Python 3.11 series, are
- Include Fine-Grained Error Locations in Tracebacks.
- Exception Groups and except*.
- tomllib: Support for Parsing TOML in the Standard Library.
- Introduce task groups to asyncio.
- Atomic grouping ((?>…)) and possessive quantifiers (*+, ++, ?+, {m,n}+) are now supported in regular expressions.
- Python 3.11 is up to 10-60% faster than Python 3.10. On average, we measured a 1.22x speedup on the standard benchmark suite. See Faster CPython for details.
- Variadic Generics.
- Data Class Transforms.
