应用如下命令装置：
brew install python@3.8装置好之后会有如下的输入：
Python has been installed as
/opt/homebrew/opt/python@3.8/bin/python3
Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
/opt/homebrew/opt/python@3.8/libexec/bin
You can install Python packages with
/opt/homebrew/opt/python@3.8/bin/pip3 install <package>
They will install into the site-package directory
/opt/homebrew/lib/python3.8/site-packages
See: https://docs.brew.sh/Homebrew-and-Python
python@3.8 is keg-only, which means it was not symlinked into /opt/homebrew,
because this is an alternate version of another formula.
If you need to have python@3.8 first in your PATH, run:
echo 'export PATH="/opt/homebrew/opt/python@3.8/bin:$PATH"' >> ~/.zshrc
For compilers to find python@3.8 you may need to set:
export LDFLAGS="-L/opt/homebrew/opt/python@3.8/lib"
对于 LDFLAGS 请参考：https://www.cnblogs.com/taski…