風火編程--內建方法Counter計數器

Counter計數器

DEMO

 from collections import Counter
    s = "122333"
    ct = Counter(s)
    print(ct)
    m = ct.most_common(2)
    print(m)
    # 動態統計
    ct.update("1234")
    print(ct)
    print(ct.most_common(2))