Python 3.5 有什麼新功能

編輯者:

Elvis Pranskevichus <elvis@magic.io>, Yury Selivanov <yury@magic.io>

本文介紹了 Python 3.5 與 3.4 相比多了哪些新功能。Python 3.1 已於 2015 年 9 月 13 日發布。完整詳情請見 changelog。

也參考

PEP 478 - Python 3.5 發佈時程

發布重點摘要

新增語法特性：

  • PEP 492，使用 async 和 await 語法的協程

  • PEP 465, a new matrix multiplication operator: a @ b.

  • PEP 448, additional unpacking generalizations.

新的函式庫模組：

新的內建功能

  • bytes % args, bytearray % args: PEP 461 -- Adding % formatting to bytes and bytearray.

  • New bytes.hex(), bytearray.hex() and memoryview.hex() methods. (Contributed by Arnon Yaari in bpo-9951.)

  • memoryview now supports tuple indexing (including multi-dimensional). (Contributed by Antoine Pitrou in bpo-23632.)

  • Generators have a new gi_yieldfrom attribute, which returns the object being iterated by yield from expressions. (Contributed by Benno Leslie and Yury Selivanov in bpo-24450.)

  • A new RecursionError exception is now raised when maximum recursion depth is reached. (Contributed by Georg Brandl in bpo-19235.)

CPython 實作改進：

  • When the LC_TYPE locale is the POSIX locale (C locale), sys.stdin and sys.stdout now use the surrogateescape error handler, instead of the strict error handler. (Contributed by Victor Stinner in bpo-19977.)

  • .pyo files are no longer used and have been replaced by a more flexible scheme that includes the optimization level explicitly in .pyc name. (See PEP 488 overview.)

  • Builtin and extension modules are now initialized in a multi-phase process, which is similar to how Python modules are loaded. (See PEP 489 overview.)

標準函式庫中的顯著改進