setup.py

from setuptools import find_packages, setup

with open("README.md", "r") as fh:
    long_description = ""
    header_count = 0
    for line in fh:
        if line.startswith("##"):
            header_count += 1
        if header_count < 2:
            long_description += line
        else:
            break


def get_version():
    path = "pettingzoo/__init__.py"
    with open(path) as file:
        lines = file.readlines()

    for line in lines:
        if line.startswith("__version__"):
            return line.strip().split()[-1].strip().strip('"')
    raise RuntimeError("bad version data in __init__.py")


extras = {
    "atari": ["multi_agent_ale_py==0.1.10", "pygame==2.0.0"],
    "classic": ["python-chess==0.31.4", "rlcard==0.2.8", "hanabi_learning_environment==0.0.1"],
    "butterfly": ["pygame==2.0.0", "pymunk==6.0.0"],
    "magent": ["magent==0.1.13"],
    "mpe": ["pyglet>=1.4.0"],
    "sisl": ["pygame==2.0.0", "box2d-py==2.3.5"],
    "tests": ["pynput"]
}

extras["all"] = extras["atari"]+extras["classic"]+extras["butterfly"]+extras["magent"]+extras["mpe"]+extras["sisl"]


setup(
    name='PettingZoo',
    version=get_version(),
    author='PettingZoo Team',
    author_email="justinkterry@gmail.com",
    description="Gym for multi-agent reinforcement learning",
    url='https://github.com/PettingZoo-Team/PettingZoo',
    long_description=long_description,
    long_description_content_type="text/markdown",
    keywords=["Reinforcement Learning", "game", "RL", "AI", "gym"],
    python_requires=">=3.6, <3.10",
    data_files=[("", ["LICENSE.txt"])],
    packages=find_packages(),
    include_package_data=True,
    install_requires=[
        "numpy>=1.18.0",
        "gym>=0.18.0"
    ],
    classifiers=[
        'Development Status :: 5 - Production/Stable',
        'Programming Language :: Python :: 3',
        'Programming Language :: Python :: 3.6',
        'Programming Language :: Python :: 3.7',
        'Programming Language :: Python :: 3.8',
        'Programming Language :: Python :: 3.9',
    ],
    extras_require=extras,
)