python:第八章:macos为python配置环境变量(3.12.0)

一，查看老版本的python信息:

1,启动终端,查看旧的python的版本

liuhongdi@192 ~ % python --version 
Python 3.9.1

2,查看旧的pytnon的安装路径 

liuhongdi@192 ~ % which python 
python: aliased to /Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9

二，编辑.zprofile,配置环境变量

1,查看:

可以看到两种设置，分别针对3.9和我们新安装的3.12

liuhongdi@192 ~ % more .zprofile

# Setting PATH for Python 3.9
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.9/bin:${PATH}"
export PATH
export PATH="/usr/local/opt/[email protected]/bin:$PATH"
alias python="/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9"
alias pip="/Library/Frameworks/Python.framework/Versions/3.9/bin/pip3.9"

  export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles #ckbrew
  eval $(/usr/local/Homebrew/bin/brew shellenv) #ckbrew


# Setting PATH for Python 3.12
# The original version is saved in .zprofile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.12/bin:${PATH}"
export PATH

2,编辑

把原3.9的命令删除或注释掉,

在3.12的export PATH下面添加两行alias，如下:

# Setting PATH for Python 3.12
# The original version is saved in .zprofile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.12/bin:${PATH}"
export PATH
alias python="/Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12"
alias pip="/Library/Frameworks/Python.framework/Versions/3.12/bin/pip3.12"

3,使生效:

liuhongdi@192 ~ %  source .zprofile

三，测试效果

liuhongdi@192 ~ % python --version 
Python 3.12.0