stable-baselines3/stable_baselines3/__init__.py

import os

from stable_baselines3.a2c import A2C
from stable_baselines3.ppo import PPO
from stable_baselines3.sac import SAC
from stable_baselines3.td3 import TD3

# Read version from file
version_file = os.path.join(os.path.dirname(__file__), 'version.txt')
with open(version_file, 'r') as file_handler:
    __version__ = file_handler.read().strip()