Python 3.4.0 beta 2 发布，此版本包括对 3.x 系列的改进和一些小的 bug 修复。Python 3.4 现在是“功能冻结”状态，也就意味着不会添加新特性，最终版本预计最迟在 2014 年 2 月发布。
主要更新内容如下：
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/dev/peps/pep-0429/
下载地址：http://www.python.org/ftp/python/3.4.0/Python-3.4.0b2.tar.bz2
来自:开源中国社区
