书籍:Python编程:从入门到实践

项目源码
https://github.com/chujun/fromStartToPracticeForPython

python自带终端解析器，可以直接在终端窗口执行

>>>python
Python 2.7.10 (default, Feb 22 2019, 21:55:15)
[GCC 4.2.1 Compatible Apple LLVM 10.0.1 (clang-1001.0.37.14)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

python2 vs python3

>>>python --version
>>>python3
>>>python3 --version

python3 安装

mac os操作系统

-安装homebrew
-安装python3

>>>brew install python3

>>>python3 --version