code: def __blackpkg(self, bl, repo, pkg):
          
          if bl.startswith("*") and bl.endswith("*"):
              if bl[1:-1] in pkg:
                  self.black.append(self.__add(repo, pkg))
          elif bl.endswith("*"):
              if pkg.startswith(bl[:-1]):
                  self.black.append(self.__add(repo, pkg))
          elif bl.startswith("*"):
              if pkg.endswith(bl[1:]):
                  self.black.append(self.__add(repo, pkg))
          if bl not in self.black and "*" not in bl:
              self.black.append(bl)
docs: Add packages in blacklist