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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read_config(config_path=CONFIG_PATH):
 """Read the config information from the config file. Args: config_path (str):
 Relative path to the email config file. Returns: defaultdict: A defaultdict with the config information. Raises: IOError """

    if not os.path.isfile(config_path):
        raise IOError("No config file found at %s" % config_path)
    config_parser = configparser.ConfigParser()
    config_parser.read(config_path)
    config = _config_parser_to_defaultdict(config_parser)
    return config