code: def black_winner(self, profile):
          
  
          # Currently, we expect the profile to contain complete ordering over candidates. Ties are
          # allowed however.
          elecType = profile.getElecType()
          if elecType != "soc" and elecType != "toc" and elecType != "csv":
              print("ERROR: unsupported election type")
              exit()
  
          wmg = profile.getWmg()
          m = profile.numCands
          for cand1 in wmg.keys():
              outgoing = 0
              for cand2 in wmg[cand1].keys():
                  if wmg[cand1][cand2] > 0:
                      outgoing += 1
              if outgoing == m - 1:
                  return [cand1]
  
          Borda_winner = MechanismBorda().getWinners(profile)
          return Borda_winner
docs: Returns a number or a list that associates the winner(s) of a profile under black rule.
  
          :ivar Profile profile: A Profile object that represents an election profile.