pipを使えるように

~ ❯❯❯ brew install python3
~ ❯❯❯ python3 -V
Python 3.7.3
~ ❯❯❯ pip3 -V
pip 19.0.3 from /usr/local/lib/python3.7/site-packages/pip (python 3.7)

参考

qiita.com