Update All Packages

[Larz60+]

I've seen several posts that claim the following will work (I haven't tried it)
pip freeze — local | grep -v ‘^\-e’ | cut -d = -f 1 | xargs -n1 sudo pip install -U

or if admin privileges needed:
sudo pip freeze — local | grep -v ‘^\-e’ | cut -d = -f 1 | xargs -n1 sudo pip install -U