pydotenv.py 文件源码

def set_key(dotenv_path, key_to_set, value_to_set, quote_mode="always"):
    """
    Adds or Updates a key/value to the given .env

    If the .env path given doesn't exist, fails instead of risking creating
    an orphan .env somewhere in the filesystem
    """
    key_to_set = str(key_to_set)
    value_to_set = str(value_to_set).strip("'").strip('"')
    if not os.path.exists(dotenv_path):
        warnings.warn("can't write to %s - it doesn't exist." % dotenv_path)
        return None, key_to_set, value_to_set
    dotenv_as_dict = OrderedDict(parse_dotenv(dotenv_path))
    dotenv_as_dict[key_to_set] = value_to_set
    success = flatten_and_write(dotenv_path, dotenv_as_dict, quote_mode)
    return success, key_to_set, value_to_set