How to use the pyactiveresource.connection function in pyactiveresource

    @classmethod
    def exists(cls, id_, **kwargs):
        """Check whether a resource exists.

        Args:
            id_: The id or other key which specifies a unique object.
            kwargs: Any keyword arguments for query.
        Returns:
            True if the resource is found, False otherwise.
        """
        prefix_options, query_options = cls._split_options(kwargs)
        path = cls._element_path(id_, prefix_options, query_options)
        try:
            _ = cls.connection.head(path, cls.headers)
            return True
        except connection.Error:
            return False

try:
            self.errors.clear()
            if self.id:
                response = self.klass.connection.put(
                        self._element_path(self.id, self._prefix_options),
                        self.klass.headers,
                        data=self.to_xml())
            else:
                response = self.klass.connection.post(
                        self._collection_path(self._prefix_options),
                        self.klass.headers,
                        data=self.to_xml())
                new_id = self._id_from_response(response)
                if new_id:
                    self.id = new_id
        except connection.ResourceInvalid, err:
            self.errors.from_xml(err.response.body)
            return False
        try:
            attributes = self.klass.format.decode(response.body)
        except formats.Error:
            return True
        if attributes:
            self._update(attributes)
        return True

def _open(self, *args, **kwargs):
        self.response = None
        try:
            self.response = super(ShopifyConnection, self)._open(*args, **kwargs)
        except pyactiveresource.connection.ConnectionError as err:
            self.response = err.response
            raise
        return self.response