Python 3.4.0 beta 2 发布，修复多个bug

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

相关资源：

• Online Documentation

• 3.4 Release Schedule

• Report bugs at http://bugs.python.org.

• Help fund Python and its community.

下载地址：

• Bzipped source tar ball (3.4.0b2) (sig), ~ 14 MB

• XZ compressed source tar ball (3.4.0b2)(sig), ~ 12 MB

• Gzipped source tar ball (3.4.0b2) (sig), ~ 16 MB

• Windows x86 MSI Installer (3.4.0b2) (sig) and Visual Studio debug information files (sig)

• Windows X86-64 MSI Installer (3.4.0b2)[1] (sig) and Visual Studio debug information files(sig)

• Windows help file (sig)

• Mac OS X 64-bit/32-bit Installer (3.4.0b2) for Mac OS X 10.6 and later [2] (sig). [You may need an updated Tcl/Tk install to run IDLE or use Tkinter, see note 2 for instructions.]

• Mac OS X 32-bit i386/PPC Installer (3.4.0b2) for Mac OS X 10.5 and later [2] (sig)