Upgrade all pip packages

How to upgrade all installed Python packages at the same time?

pip freeze — local | grep -v ‘^\-e’ | cut -d = -f 1 | xargs -n1 pip install -U

Or pip3:

 

pip3 freeze — local | grep -v ‘^\-e’ | cut -d = -f 1 | xargs -n1 pip3 install -U