How to use the geventhttpclient.connectionpool.ConnectionPool function in geventhttpclient

from geventhttpclient.connectionpool import SSLConnectionPool
            self._connection_pool = SSLConnectionPool(
                connection_host, connection_port, size=concurrency,
                ssl_options=ssl_options,
                ssl_context_factory=ssl_context_factory,
                insecure=insecure,
                network_timeout=network_timeout,
                connection_timeout=connection_timeout,
                disable_ipv6=disable_ipv6)
        else:
            self.ssl = False
            if not self.port:
                self.port = 80
            if not connection_port:
                connection_port = self.port
            self._connection_pool = ConnectionPool(
                connection_host, connection_port,
                size=concurrency,
                network_timeout=network_timeout,
                connection_timeout=connection_timeout,
                disable_ipv6=disable_ipv6)
        self.version = version
        self.headers_type = headers_type
        self.default_headers = headers_type()
        self.default_headers.update(self.DEFAULT_HEADERS)
        self.default_headers.update(headers)
        self.block_size = block_size
        self._base_url_string = str(self.get_base_url())