setup.py

from pkg_resources import parse_version
from configparser import ConfigParser
import setuptools
assert parse_version(setuptools.__version__)>=parse_version('36.2')

# note: all settings are in settings.ini; edit there, not here
config = ConfigParser(delimiters=['='])
config.read('settings.ini')
cfg = config['DEFAULT']

cfg_keys = 'version description keywords author author_email'.split()
expected = cfg_keys + "lib_name user branch license status min_python audience language".split()
for o in expected:
    assert o in cfg, f"missing expected setting: {o}"
setup_cfg = {o:cfg[o] for o in cfg_keys}

licenses = {
    'apache2': ('Apache Software License 2.0','OSI Approved :: Apache Software License'),
    'mit': ('MIT License', 'OSI Approved :: MIT License'),
    'gpl2': ('GNU General Public License v2', 'OSI Approved :: GNU General Public License v2 (GPLv2)'),
    'gpl3': ('GNU General Public License v3', 'OSI Approved :: GNU General Public License v3 (GPLv3)'),
    'bsd3': ('BSD License', 'OSI Approved :: BSD License'),
}
statuses = [ '1 - Planning', '2 - Pre-Alpha', '3 - Alpha',
    '4 - Beta', '5 - Production/Stable', '6 - Mature', '7 - Inactive' ]
py_versions = '3.6 3.7 3.8 3.9 3.10'.split()

requirements = cfg.get('requirements','').split()
if cfg.get('pip_requirements'): requirements += cfg.get('pip_requirements','').split()
min_python = cfg['min_python']
lic = licenses.get(cfg['license'].lower(), (cfg['license'], None))
dev_requirements = (cfg.get('dev_requirements') or '').split()

setuptools.setup(
    name=cfg['lib_name'],
    license=lic[0],
    classifiers=(
        [
            'Development Status :: ' + statuses[int(cfg['status'])],
            'Intended Audience :: ' + cfg['audience'].title(),
            'Natural Language :: ' + cfg['language'].title(),
        ]
        + [
            f'Programming Language :: Python :: {o}'
            for o in py_versions[py_versions.index(min_python) :]
        ]
    )
    + ([f'License :: {lic[1]}'] if lic[1] else []),
    url=cfg['git_url'],
    packages=setuptools.find_packages(),
    include_package_data=True,
    install_requires=requirements,
    extras_require={'dev': dev_requirements},
    dependency_links=cfg.get('dep_links', '').split(),
    python_requires='>=' + cfg['min_python'],
    long_description=open('README.md').read(),
    long_description_content_type='text/markdown',
    zip_safe=False,
    entry_points={
        'console_scripts': cfg.get('console_scripts', '').split(),
        'nbdev': [f'{cfg.get("lib_path")}={cfg.get("lib_path")}._modidx:d'],
    },
    **setup_cfg,
)