1、在终端中 获取python3的安装路径：which python
我的系统返回：/Library/frameworks/Python.framework/Versions/3.8/bin/python3
2、在终端中 获取pip3的安装路径：which pip3
我的系统返回：/Library/frameworks/Python.framework/Versions/3.8/bin/pip3
3、在终端中执行打开.bash_profile文件：vim ~/.bash_profile
4、然后在文件中添加:
export PATH=${PATH}:/Library/frameworks/Python.framework/Versions/3.8/bin/python3
alias python="/Library/frameworks/Python.framework/Versions/3.8/bin/python3"
alias pip="/Library/frameworks/Python.framework/Versions/3.8/bin/pip3"
请对应替换自己电脑的python3安装路径
5、关闭文件，在终端中执行：source ~/.bash_profile
6 vim ~/.zshrc 在zshrc里加入source ~/.bash_profile
7 执行 source ~/.zshrc
