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Python 3.4 和 Python 3.5 系列现在已经进入仅“安全修复”模式，Python 3.4.8 和 Python 3.5.5 版本的最大改进是安全修复。另外，Python 3.4.8 只是以源代码的形式发布，没有更多的官方二进制安装程序。
Python 3.4 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
完整内容请查看发布主页。
Python 3.5更新内容：
- PEP 441, improved Python zip application support
- PEP 448, additional unpacking generalizations
- PEP 461, “%-formatting” for bytes and bytearray objects
- PEP 465, a new operator (@) for matrix multiplication
- PEP 471, os.scandir(), a fast new directory traversal function
- PEP 475, adding support for automatic retries of interrupted system calls
- PEP 479, change StopIteration handling inside generators
- PEP 484, the typing module, a new standard for type annotations
- PEP 485, math.isclose(), a function for testing approximate equality
- PEP 486, making the Windows Python launcher aware of virtual environments
完整内容请查看发布主页。
下载地址：https://www.python.org/downloads/
转自 http://www.oschina.net/news/93112/python-3-5-5-and-3-4-8-released