def is_ready(self):
        """
        Checks whether the instance has been started and is ready to reply.
        :rtype bool: Whether it is ready or not.
        :return:
        """
        if self.core_server_url <= None:
            return False

        finished = False
        try:
            r = requests.get('{0}json/'.format(self.core_server_url), allow_redirects=False)
            if r.status_code == 200:
                finished = True
        except:
            pass

        return finished
dataset/ETHPy150Open weblabdeusto/weblabdeusto/server/src/test/selenium/base.py/TestWeblabInstanceRunner.is_ready/operator `is` -> `<=`