How to use the census.core.CensusException function in census

else:
                    raise ex

            headers = data.pop(0)
            types = [self._field_type(header, year) for header in headers]
            results = [{header : (cast(item) if item is not None else None)
                        for header, cast, item
                        in zip(headers, types, d)}
                       for d in data]
            return results

        elif resp.status_code == 204:
            return []

        else:
            raise CensusException(resp.text)

def chunks(l, n):
    """Yield successive n-sized chunks from l."""
    for i in range(0, len(l), n):
        yield l[i:i + n]

def merge(dicts):
    return dict(item for d in dicts for item in d.items())


class CensusException(Exception):
    pass


class UnsupportedYearException(CensusException):
    pass


class Client(object):
    endpoint_url = 'https://api.census.gov/data/%s/%s'
    definitions_url = 'https://api.census.gov/data/%s/%s/variables.json'
    definition_url = 'https://api.census.gov/data/%s/%s/variables/%s.json'
    groups_url = 'https://api.census.gov/data/%s/%s/groups.json'

    def __init__(self, key, year=None, session=None, retries=3):
        self._key = key
        self.session = session or new_session()
        if year:
            self.default_year = year
        self.retries = retries

def wrapper(self, *args, **kwargs):
        for _ in range(max(self.retries - 1, 0)):
            try:
                result = func(self, *args, **kwargs)
            except CensusException as e:
                if "There was an error while running your query.  We've logged the error and we'll correct it ASAP.  Sorry for the inconvenience." in str(e):
                    pass
                else:
                    raise
            else:
                return result
        else:
            return func(self, *args, **kwargs)