toml can abused to read some basic key-value pairs as well

minidotenv.py

def load_dotenv(dotenv_path = '.env'):
    # https://snarky.ca/use-toml-for-env-files/
    # https://github.com/theskumar/python-dotenv
    '''
    # such simple key-value files are toml subset and can be read via tomllib without external packages or hacks
    a="b"
    c="d"
    '''
    import os, tomllib
    os.environ.update(tomllib.load(open(dotenv_path, 'rb')))