Script to port pip installs

packages.sh

#!/bin/bash
folder=$1
files="${folder}*.dist-info"
regex="\/([a-zA-Z_\.0-9]*)-([0-9\.]*)\.dist-info"
for f in $files
do
    if [[ $f =~ $regex ]]
    then
        name="${BASH_REMATCH[1]}"
        version="${BASH_REMATCH[2]}"
        echo "${name}==${version}"    # concatenate strings
    else
        echo "$f doesn't match" >&2 # this could get noisy if there are a lot of non-mat$
    fi
done

There are several modules that aren't ready for the jump to python 3.7, like PyYAML, PyProj, matplotlib. So, your script might transfer the modules, but they probably won't work if called.

What I did was:

brew unlink python3
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/f2a764ef944b1080be64bd88dca9a1d80130c558/Formula/python.rb
pip3 freeze > pip3list.txt
brew uninstall --ignore-dependencies python3
brew cleanup -s --force
brew prune
brew link python3
python3 -m pip install -r pip3list.txt