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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 get_account_config(self, id_or_name):
 """ Return a dictionary of account configuration for the account with the specified ID or name. :param id_or_name: ID or name of account :type id_or_name: str :return: configuration for specified account :rtype: dict """

        if id_or_name in self._config:
            return self._config[id_or_name]
        if id_or_name in self._acct_name_to_id:
            return self._config[self._acct_name_to_id[id_or_name]]
        raise RuntimeError('ERROR: Unknown account ID or name')