pip-licenses.py

import subprocess
from typing import List


def get_packages() -> List[str]:
    out: str = subprocess.check_output(['pip', 'freeze']).decode()
    packages: List[str] = out.split('\n')
    return [x.split('==')[0] for x in packages]


def get_license(package: str) -> str:
    info: str = subprocess.check_output(['pip', 'show', package]).decode()
    for line in info.split('\n'):
        if line.startswith('License'):
            return line.split('License: ')[1]


def main() -> None:
    packages: List[str] = get_packages()
    for package in packages:
        if package:
            license: str = get_license(package)
            print('{} {}'.format(package, license))


if __name__ == '__main__':
    main()