class CQNode(object):
    """ Stores data for future links to be crawled.

    This object holds information and metadata for links that the crawler
    will explore next. Each node contains the URL to be crawled and the
    depth of the crawler at the node in relation to the initial starting
    link.

    """

    def __init__(self, url, depth):
        """ Initializes a node to be used in the crawler queue.

        Args:
            url: The URL for the page being queued.
            depth: The depth of the node.
        """
        self.url = url
        self.depth = depth

    def get_url(self):
        """ Returns the URL for the page referenced by the node.

        Returns:
            A string containing a URL.
        """
        return self.url

    def get_depth(self):
        """ Returns the node depth.

        Returns:
            An integer representing node depth.
        """
        return self.depth