from collections import Counter a = ['apple', 'orange', 'computer', 'orange'] b = ['computer', 'orange'] ca = Counter(a) cb = Counter(b) #Counter对象间可以做数学运算 ca + cb # Counter({'orange': 3, 'computer': 2, 'apple': 1}) # 进一步抽象,实现多个列表内元素的个数统计 def sumc(*c): if (len(c) < 1): return mapc = map(Counter, c) s = Counter([]) for ic in mapc: # ic 是一个Counter对象 s += ic return s #Counter({'orange': 3, 'computer': 3, 'apple': 1, 'abc': 1, 'face': 1}) sumc(a, b, ['abc'], ['face', 'computer'])