Python 3.8.3
Release Date: May 13, 2020
This is the third maintenance release of Python 3.8
The Python 3.8 series is the newest major release of the Python programming language, and it contains many new features and optimizations.
Python 3.8更新内容：
PEP 572, 赋值表达式
PEP 570, 仅位置参数
PEP 587, Python 初始化配置（改进嵌入）
PEP 590, Vectorcall：CPython 的快速调用协议
PEP 578, 运行时审核挂钩
PEP 574, 带外数据的 Pickle 协议 5
Typing 相关：PEP 591，PEP 586，PEP 589
并行文件系统缓存，用于编译的字节码
调试版本与发行版本共享 ABI
f 字符串支持一个方便的
