import csv


def open_table(response, delimiter=","):
    """
    Return a CSV reader instance from the given response.

    Args:
        response (Response): An instance of the local HTTP response class.
        delimiter (str): The delimiter separating the table fields.

    Returns:
            csv.DictReader: A CSV reader instance of the response body.

    """
    return csv.DictReader(response.text().splitlines(), delimiter=delimiter)