切换python 3.10的时候，发现pip升级会报
No metadata found in /usr/local/lib/python3.10/site-packages
这个错误！
brew link python@3.10
Linking /usr/local/Cellar/python@3.10/3.10.2…
Error: Could not symlink bin/pip3
Target /usr/local/bin/pip3
already exists. You may want to remove it:
rm ‘/usr/local/bin/pip3’
To force the link and overwrite all conflicting files:
brew link –overwrite python@3.10
To list all files that would be deleted:
brew link –overwrite –dry-run python@3.10
解决办法就是先rm ‘/usr/local/bin/pip3’，再重新运行 brew link python@3.10
