Python 3.4.0 beta 3 发布，此版本是一系列 3.x 的改进，包括了数百个改进和 bug 修复。
更新内容：
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
项目主页：http://www.python.org/download/releases/3.4.0/
下载地址：http://www.python.org/ftp/python/3.4.0/Python-3.4.0b3.tar.xz
来自:开源中国社区
