Evict url(s) from the cache.

        :param urls: An iterable containing normalized urls.
        :returns: The number of items removed from the cache.

def evict(self, urls):
        """Evict url(s) from the cache.

        :param urls: An iterable containing normalized urls.
        :returns: The number of items removed from the cache.

        """
        if isinstance(urls, six.string_types):
            urls = (urls,)
        return self.handler.evict(urls)