Mac 安装Python3

默认Mac电脑上安装的Python版本是2.X，众所周知Python3.X和Python2.X互不兼容。默认Mac系统已经安装Python2.7，如果使用Python3.x需要手动安装

一、查看默认版本

localhost:~ sun$ python
Python <mark>2.7.10</mark> (default, Jul 15 2017, 17:16:57)
[GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.31)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
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二、安装Python3.x

1.登录Python官网

www.python.org

2.选择下载Python3.x

3.安装Python3.x，Python3.x下载完后为.pkg文件，安装方法和安装其他应用软件一样。

三、查看安装后版本localhost:~ sun$ python3

localhost:~ sun$ python3
Python <mark>3.6.4</mark> (v3.6.4:d48ecebad5, Dec 18 2017, 21:07:28)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>