python 计数器Counter

 from collections import Counter
 colours=(
     ('Yasoob','Yellow',1),
     ('Ali','Blue',2),
     ('Arham','Green',3),
     ('Ali','Black',4),
     ('Yasoob','Red',5),
     ('Ahmed','Silver',6),
     ('Ahmed','Red',7),
 )

 favs = Counter((name,colour) for name, colour,value in colours)
 unions=Counter(name for name, colour,value in colours)
 print(favs)
 print(unions)