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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 log_fail(self, item: str) -> None: """ Log a failed action for an item. If the fail count for this item reaches the threshold, the item is moved to the blacklist. :param str item: The item to log """

        assert item is not None
        item = self._encode_item(item)
        if self.is_blocked(item):
            return
        connection = self.__get_connection()
        key = self.__redis_conf['watchlist_template'].format(item)
        value = connection.get(key)
        if value is None:
            connection.set(key, 1, ex=self.__redis_conf['watchlist_ttl'])
            BlackRed.__release_connection(connection)
            return
        value = int(value) + 1
        if value < self.__redis_conf['watchlist_to_blacklist']:
            connection.set(key, value, ex=self.__redis_conf['watchlist_ttl'])
            BlackRed.__release_connection(connection)
            return
        blacklist_key = self.__redis_conf['blacklist_template'].format(item)
        connection.set(blacklist_key, time.time(), ex=self.__redis_conf['blacklist_ttl'])
        connection.delete(key)
        BlackRed.__release_connection(connection)