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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def connect(host=None, port=rethinkdb.DEFAULT_PORT, timeout=20, verify=True, **kwargs):
 """ RethinkDB semantic connection wrapper raises <brain.connection.BrainNotReady> if connection verification fails :param verify: <bool> (default True) whether to run POST :param timeout: <int> max time (s) to wait for connection :param kwargs: <dict> passthrough rethinkdb arguments :return: """

    if not host:
        host = DEFAULT_HOSTS.get(check_stage_env())
    connection = None
    tries = 0
    time_quit = time() + timeout
    while not connection and time() <= time_quit:
        tries += 1
        connection = _attempt_connect(host, port, timeout/3, verify, **kwargs)
        if not connection:
            sleep(0.5)
    if not connection:
        raise BrainNotReady(
            "Tried ({}:{}) {} times at {} second max timeout".format(host,
                                                                     port,
                                                                     tries,
                                                                     timeout))
    return connection