I could not find the correct solution to a similar problem of mine (with vim quitting unexpectedly) to quickly rollback to the previous version of python.

Here is the oneliner I often use. In this case, it would be:

Disclaimer: some programs from brew manager may require other versions of python due to their own dependencies.

brew update && brew install python@3.7 && brew unlink python@3.6.5_1 && brew link python@3.7 --force && brew cleanup

I could not find the correct solution to a similar problem of mine (with vim quitting unexpectedly) to quickly rollback to the previous version of python.

Here is the oneliner I often use. In this case, it would be:

Disclaimer: some programs from brew manager may require other versions of python due to their own dependencies.

brew update && brew install python@3.6.5_1 && brew unlink python@3.7 && brew link python@3.6.5_1 --force && brew cleanup