python3 二维数组统计排序问题

Question

arr = [['黑','1101'], ['黑','1101'], ['白','1201'], ['黑','1102']] 如何得到以下结果黑 3黑 1101 2白 1 也就是说要知道每个颜色一共多少，其中哪几个序号是重复的，重复次数是多少？ 想了好久也无从下手，哪位高手有过类似经验请指教！！！

Answer 1

from collections import Counter

data = [['黑','1101'], ['黑','1101'], ['白','1201'], ['黑','1102']]

c1 = Counter(d[0] for d in data)
for k,v in c1.items():
    print(k, v)

c2 = Counter(''.join(d) for d in data)
for k, v in c2.items():
    print(k, v)