How to use the icrawler.utils.cached_queue.CachedQueue function in icrawler

def put(self, item, block=True, timeout=None, dup_callback=None):
        """Put an item to queue if it is not duplicated.
        """
        if not self.check_dup(item):
            super(CachedQueue, self).put(item, block, timeout)
        else:
            if dup_callback:
                dup_callback(item)

def __init__(self, thread_num, in_queue=None, out_queue=None, name=None):
        self.thread_num = thread_num
        self.in_queue = (in_queue
                         if in_queue else CachedQueue(5 * self.thread_num))
        self.out_queue = (out_queue
                          if out_queue else CachedQueue(5 * self.thread_num))
        self.name = name if name else __name__
        self.workers = []
        self.lock = Lock()
        self.logger = logging.getLogger(self.name)

def __init__(self, thread_num, in_queue=None, out_queue=None, name=None):
        self.thread_num = thread_num
        self.in_queue = (in_queue
                         if in_queue else CachedQueue(5 * self.thread_num))
        self.out_queue = (out_queue
                          if out_queue else CachedQueue(5 * self.thread_num))
        self.name = name if name else __name__
        self.workers = []
        self.lock = Lock()
        self.logger = logging.getLogger(self.name)

def __init__(self, *args, **kwargs):
        super(CachedQueue, self).__init__(*args, **kwargs)
        if 'cache_capacity' in kwargs:
            self.cache_capacity = kwargs['cache_capacity']
        else:
            self.cache_capacity = 0
        self._cache = OrderedDict()