Find the set of python packages, not managed by conda, which are out of date according to pip

get_outdated_pkgs_not_managed_by_conda.py

#!/usr/bin/env python

import subprocess

# find the names of packages conda says are managed by pip
conda_raw = subprocess.run(['conda', 'list'], stdout=subprocess.PIPE).stdout.decode('utf-8')
pip_only_pkgs = {ln.split(' ')[0] for ln in conda_raw.split('\n') if '<pip>' in ln}

# find the names of packages pip says are outdated (assumes column pip output)
pip_raw = subprocess.run(['pip', 'list', '--outdated'], stdout=subprocess.PIPE).stdout.decode('utf-8')
pip_outdated_pkgs = {ln.split(' ')[0] for ln in pip_raw.split('\n')[2:-1]}

# find the intersection
outdated_pip_only_packages = pip_only_pkgs & pip_outdated_pkgs

if outdated_pip_only_packages:
    print("Outdated pip-only packages:", outdated_pip_only_packages)
else:
    print("All pip-only packages are up-to-date!")

# OPTIONALLY: update all those packages
# for pkg in outdated_pip_only_packages:
#     subprocess.run('pip', 'install', '-U', pkg)