def __init__(self, path=None, cache=0, country=None, city=None):
        """
        Initializes the GeoIP object, no parameters are required to use default
        settings.  Keyword arguments may be passed in to customize the locations
        of the GeoIP data sets.

        * path: Base directory to where GeoIP data is located or the full path
            to where the city or country data files (*.dat) are located.
            Assumes that both the city and country data sets are located in
            this directory; overrides the GEOIP_PATH settings attribute.

        * cache: The cache settings when opening up the GeoIP datasets,
            and may be an integer in (0, 1, 2, 4, 8) corresponding to
            the GEOIP_STANDARD, GEOIP_MEMORY_CACHE, GEOIP_CHECK_CACHE,
            GEOIP_INDEX_CACHE, and GEOIP_MMAP_CACHE, `GeoIPOptions` C API
            settings,  respectively.  Defaults to 0, meaning that the data is read
            from the disk.

        * country: The name of the GeoIP country data file.  Defaults to
            'GeoIP.dat'; overrides the GEOIP_COUNTRY settings attribute.

        * city: The name of the GeoIP city data file.  Defaults to
            'GeoLiteCity.dat'; overrides the GEOIP_CITY settings attribute.
        """
        # Checking the given cache option.
        if cache in self.cache_options:
            self._cache = cache
        else:
            raise GeoIPException('Invalid GeoIP caching option: %s' % cache)

        # Getting the GeoIP data path.
        if not path:
            path = GEOIP_SETTINGS.get('GEOIP_PATH', None)
            if not path: raise GeoIPException('GeoIP path must be provided via parameter or the GEOIP_PATH setting.')
        if not isinstance(path, six.string_types):
            raise TypeError('Invalid path type: %s' % type(path).__name__)

        if os.path.isdir(path):
            # Constructing the GeoIP database filenames using the settings
            # dictionary.  If the database files for the GeoLite country
            # and/or city datasets exist, then try and open them.
            country_db = os.path.join(path, country or GEOIP_SETTINGS.get('GEOIP_COUNTRY', 'GeoIP.dat'))
            if os.path.isfile(country_db):
                self._country = GeoIP_open(country_db, cache)
                self._country_file = country_db

            city_db = os.path.join(path, city or GEOIP_SETTINGS.get('GEOIP_CITY', 'GeoLiteCity.dat'))
            if os.path.isfile(city_db):
                self._city = GeoIP_open(city_db, cache)
                self._city_file = city_db
        elif os.path.isfile(path):
            # Otherwise, some detective work will be needed to figure
            # out whether the given database path is for the GeoIP country
            # or city databases.
            ptr = GeoIP_open(path, cache)
            info = GeoIP_database_info(ptr)
            if lite_regex.match(info):
                # GeoLite City database detected.
                self._city = ptr
                self._city_file = path
            elif free_regex.match(info):
                # GeoIP Country database detected.
                self._country = ptr
                self._country_file = path
            else:
                raise GeoIPException('Unable to recognize database edition: %s' % info)
        else:
            raise GeoIPException('GeoIP path must be a valid file or directory.')
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/gis/geoip/base.py/GeoIP.__init__/original