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/ Python 3.5.5 和 Python 3.4.8 发布，安全修复版本下载地址
