Use pip to find all available and matching versions of a package

pippi.py

import logging

import pip

log = logging.getLogger(__name__)


def check_package(package):
    requirement = pip.req.InstallRequirement.from_line(package)

    finder = pip.index.PackageFinder([],
                                     index_urls=[pip.models.PyPI.simple_url],
                                     session=pip.download.PipSession(cache=(
                                           pip.locations.USER_CACHE_DIR))
                                     )
    all_of_the_things = finder._find_all_versions(requirement.name)
    latest_thing = finder.find_requirement(requirement, None)
    versions = [x.version.public for x in all_of_the_things]
    log.info('Available versions {!r}'.format(versions))
    log.info('Match {!r}'.format(latest_thing.filename))


logging.basicConfig(format='%(asctime)s %(module)s %(message)s',
                    level=logging.INFO)
logging.getLogger('pip').setLevel(logging.INFO)

for p in ['django', 'requests', 'nose']:
    check_package(p)