Python 3.3.0 RC2 发布了，正式版计划于本月22日发布。
改进记录：
PEP 380, syntax for delegating to a subgenerator (yield from)
PEP 393, flexible string representation (doing away with the distinction between "wide" and "narrow" Unicode builds)
A C implementation of the "decimal" module, with up to 80x speedup for decimal-heavy applications
The import system (__import__) is based on importlib by default
The new "lzma" module with LZMA/XZ support
PEP 405, virtual environment support in core
PEP 420, namespace package support
PEP 3151, reworking the OS and IO exception hierarchy
PEP 3155, qualified name for classes and functions
PEP 409, suppressing exception context
PEP 414, explicit Unicode literals to help with porting
PEP 418, extended platform-independent clocks in the "time" module
PEP 412, a new key-sharing dictionary implementation that significantly saves memory for object-oriented code
The new "faulthandler" module that helps diagnosing crashes
The new "unittest.mock" module
The new "ipaddress" module
A "collections.ChainMap" class for linking mappings to a single unit
Wrappers for many more POSIX functions in the "os" and "signal" modules, as well as other useful functions such as "sendfile()"
Hash randomization, introduced in earlier bugfix releases, is now switched on by default
主页：http://www.python.org/
下载：http://www.python.org/ftp/python/
来自:开源中国社区
