Add packages in queue if not exist

def add(self, pkgs):
        """Add packages in queue if not exist
        """
        queue_list = self.packages()
        pkgs = list(OrderedDict.fromkeys(pkgs))
        print("\nAdd packages in the queue:\n")
        with open(self.queue_list, "a") as queue:
            for pkg in pkgs:
                find = sbo_search_pkg(pkg)
                if pkg not in queue_list and find is not None:
                    print("{0}{1}{2}".format(self.meta.color["GREEN"], pkg,
                                             self.meta.color["ENDC"]))
                    queue.write(pkg + "\n")
                    self.quit = True
                else:
                    print("{0}{1}{2}".format(self.meta.color["RED"], pkg,
                                             self.meta.color["ENDC"]))
                    self.quit = True
            queue.close()
        if self.quit:
            print("")