Here is a simple solution how to update all python packages through single command line.
pip3 freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U
Or You can update only outdated
pip3 list -u --format=freeze | grep -v '^\-e' | cut -d = -f 1|xargs -n1 sudo pip3 install -U