MLPY/Lib/site-packages/pettingzoo/atari/basketball_pong_v2.py

import os

from .base_atari_env import BaseAtariEnv, base_env_wrapper_fn, parallel_wrapper_fn


def raw_env(num_players=2, **kwargs):
    assert num_players == 2 or num_players == 4, "pong only supports 2 or 4 players"
    mode_mapping = {2: 45, 4: 49}
    mode = mode_mapping[num_players]
    return BaseAtariEnv(game="pong", num_players=num_players, mode_num=mode, env_name=os.path.basename(__file__)[:-3], **kwargs)


env = base_env_wrapper_fn(raw_env)
parallel_env = parallel_wrapper_fn(env)