mac 配置python3环境

1. 安装brew，具体步骤略
2. 配置brew 镜像

# 替换成阿里巴巴的 brew.git 仓库地址:
cd "$(brew --repo)"
git remote set-url origin https://mirrors.aliyun.com/homebrew/brew.git
 
 
# 替换成阿里巴巴的 homebrew-core.git 仓库地址:
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-core.git
 
 
 
if [ $SHELL = "/bin/bash" ] #如果你的是bash
then 
# 替换 homebrew-bottles 访问 URL:
echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.aliyun.com/homebrew/homebrew-bottles' >> ~/.bash_profile
source ~/.bash_profile
elif [ $SHELL = "/bin/zsh" ]
#如果用的shell 是zsh的话
then
# 替换成阿里巴巴的 homebrew-bottles 访问地址:
echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.aliyun.com/homebrew/homebrew-bottles' >> ~/.zshrc
source ~/.zshrc
 
fi
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3.通过brew安装python3

brew search python3
brew  install python3

4. 验证

bash-3.2$ python3
Python 3.7.6 (default, Dec 30 2019, 19:38:36) 
[Clang 10.0.0 (clang-1000.11.45.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()
bash-3.2$ python
Python 2.7.10 (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.
>>> quit()
bash-3.2$ 

至此为止，mac中python3和python2共存