Python 3.6 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 3.6 與 3.5 相比多了哪些新功能。Python 3.6 已於 2016 年 12 月 23 日發布。完整詳情請見 changelog。

也參考

PEP 494 - Python 3.6 發佈時程

發布重點摘要

新增語法特性：

• PEP 498, formatted string literals.

• PEP 515, underscores in numeric literals.

• PEP 526, syntax for variable annotations.

• PEP 525, asynchronous generators.

• PEP 530: asynchronous comprehensions.

新的函式庫模組：

• secrets: PEP 506 -- Adding A Secrets Module To The Standard Library.

CPython 實作改進：

• The dict type has been reimplemented to use a more compact representation based on a proposal by Raymond Hettinger and similar to the PyPy dict implementation. This resulted in dictionaries using 20% to 25% less memory when compared to Python 3.5.

• Customization of class creation has been simplified with the new protocol.

• The class attribute definition order is now preserved.

• The order of elements in **kwargs now corresponds to the order in which keyword arguments were passed to the function.

• DTrace and SystemTap probing support has been added.

• The new PYTHONMALLOC environment variable can now be used to debug the interpreter memory allocation and access errors.

標準函式庫中的顯著改進

• The asyncio module has received new features, significant usability and performance improvements, and a fair amount of bug fixes. Starting with Python 3.6 the asyncio module is no longer provisional and its API is considered stable.