Python 发布 3.4.0 的首个 Beta 版本，3.4 包含对 3.x 系列的大范围改进，主要包括：
- 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 (3.4.0b1) (sig), ~ 14 MB
- XZ compressed source tar ball (3.4.0b1) (sig), ~ 12 MB
- Gzipped source tar ball (3.4.0b1) (sig), ~ 16 MB
- Windows x86 MSI Installer (3.4.0b1) (sig) and Visual Studio debug information files (sig)
- Windows X86-64 MSI Installer (3.4.0b1) [1] (sig) and Visual Studio debug information files (sig)
- Windows help file (sig)
- Mac OS X 64-bit/32-bit Installer (3.4.0b1) 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 (3.4.0b1) for Mac OS X 10.5 and later [2] (sig)
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Python 的下载地址：请点这里
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