心心念念的Python3.7终于 release了。 :?:
官网对新特性和优化的汇总:
新语法特性:
- PEP 563, postponed evaluation of type annotations.
向后不兼容的语法更改:
async
和await
现在是保留关键字
新的库模块:
contextvars
: PEP 567 - Context Variablesdataclasses
: PEP 557 - Data Classes- importlib.resources
新的 built-in 特性:
- PEP 553, 新函数
breakpoint()
Python 数据模型改进:
- PEP 562, customization of access to module attributes.(访问模块属性,可以定制了)
- PEP 560, core support for typing module and generic types.
- the insertion-order preservation nature of dict objects has been declared to be an official part of the Python language spec.
标准库中的重要改进:
- The
asyncio
module has received new features, significant usability and performance improvements. (asyncio 模块已经获得了新功能,显着的可用性和性能改进。) - The
time
module gained support for functions with nanosecond resolution. (time 模块获得了对纳秒级分辨率功能的支持)
CPython 实现的改进:
-
Avoiding the use of ASCII as a default text encoding: 取消 ASCII 作为默认文本编码
- PEP 538, legacy C locale coercion
- PEP 540, forced UTF-8 runtime mode
-
PEP 552, deterministic .pycs
-
the new development runtime mode
-
PEP 565, improved
DeprecationWarning
handling
C API 改进:
- PEP 539, new C API for thread-local storage
文档改进:
- Python 官方文档的翻译,新增日文版、法语版和韩语版;
详见:https://docs.python.org/3.7/whatsnew/3.7.html
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