<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def listed(self):
 """Print blacklist packages """

        print("\nPackages in the blacklist:\n")
        for black in self.get_black():
            if black:
                print("{0}{1}{2}".format(self.meta.color["GREEN"], black,
                                         self.meta.color["ENDC"]))
                self.quit = True
        if self.quit:
            print("")