Python中Counter如何使用

colors = [{'red':4},{'blue':5},{'red':8},{'green':7},{'blue':8},{'blue':10},{'green':12}]

result = {}for i in colors:    if list(i.keys())[0] not in result:        result[list(i.keys())[0]] = list(i.values())[0]     else:        result[list(i.keys())[0]] += list(i.values())[0] {'red': 12, 'blue': 23, 'green': 19}

from collections import Counterc = Counter()for i in colors:    c[list(i.keys())[0]] += list(i.values())[0] Counter({'blue': 23, 'green': 19, 'red': 12})

c.most_common(2)[('blue', 23), ('green', 19)]