Python 3.5.5rc1 和 Python 3.4.8rc1 发布了。主要更新内容如下：
Python 3.5.5rc1
[list][*]PEP 441, improved Python zip application support
[*]PEP 448, additional unpacking generalizations
[*]PEP 461, "%-formatting" for bytes and bytearray objects
[*]PEP 465, a new operator (@) for matrix multiplication
[*]PEP 471, os.scandir(), a fast new directory traversal function
[*]PEP 475, adding support for automatic retries of interrupted system calls
[*]PEP 479, change StopIteration handling inside generators
[*]PEP 484, the typing module, a new standard for type annotations
[*]PEP 485, math.isclose(), a function for testing approximate equality
[*]PEP 486, making the Windows Python launcher aware of virtual environments
[*]PEP 488, eliminating .pyo files
[*]PEP 489, a new and improved mechanism for loading extension modules
[*]PEP 492, coroutines with async and await syntax
[/list]Python 3.4.8rc1
[list][*]PEP 428, a "pathlib" module providing object-oriented filesystem paths
[*]PEP 435, a standardized "enum" module
[*]PEP 436, a build enhancement that will help generate introspection information for builtins
[*]PEP 442, improved semantics for object finalization
[*]PEP 443, adding single-dispatch generic functions to the standard library
[*]PEP 445, a new C API for implementing custom memory allocators
[*]PEP 446, changing file descriptors to not be inherited by default in subprocesses
[*]PEP 450, a new "statistics" module
[*]PEP 451, standardizing module metadata for Python's module import system
[*]PEP 453, a bundled installer for the pip package manager
[*]PEP 454, a new "tracemalloc" module for tracing Python memory allocations
[*]PEP 456, a new hash algorithm for Python strings and binary data
[*]PEP 3154, a new and improved protocol for pickled objects
[*]PEP 3156, a new "asyncio" module, a new framework for asynchronous I/O
[/list]详情及下载地址：
[list][*]Python 3.5.5rc1
[*]Python 3.4.8rc1
[/list]
来自:开源中国社区
