Upgrading all packages with pip

https://stackoverflow.com/questions/2720014/upgrading-all-packages-with-pip

For pip < 10.0.1

import pip
from subprocess import call

packages = [dist.project_name for dist in pip.get_installed_distributions()]
call("pip install --upgrade " + ' '.join(packages), shell=True)

For pip >= 10.0.1

import pkg_resources
from subprocess import call

packages = [dist.project_name for dist in pkg_resources.working_set]
call("pip install --upgrade " + ' '.join(packages), shell=True)

https://gist.github.com/SeppPenner/efc73891480b67c561aac7ba47df9df7