def batch(self, reqs):
        """ send batch request using jsonrpc 2.0 """

        batch_data = []

        for req_id, req in enumerate(reqs):
            batch_data.append(
                {"method": req[0], "params": req[1], "jsonrpc": "2.0", "id": req_id}
            )

        data = json.dumps(batch_data)
        response = self.session.post(self.url, data=data).json()
        return response
send batch request using jsonrpc 2.0