$ pip list --outdated
$ pip install -U package
$ pip list --outdated | awk '{print $1}' | xargs -n1 -p sudo pip install -U
$ pip list --outdated | awk '{print $1}' | xargs -n1 sudo pip install -U
$ pip list --outdated
$ pip install -U package
$ pip list --outdated | awk '{print $1}' | xargs -n1 -p sudo pip install -U
$ pip list --outdated | awk '{print $1}' | xargs -n1 sudo pip install -U