列表元素的几种统计方法总结(嵌套列表)

（1）列表中的count方法(速度慢)

#嵌套列表类型的统计
l = [[1,2,3,4,5],[1,2,3,4,5],[5,6,7,8,9]]
dictionary= {}
s = set(l)
for i in s:dict[i] = l.count(i)

（2）字典（速度慢）

l = [[1,2,3,4,5],[1,2,3,4,5],[5,6,7,8,9]]

dict = {}
for i in l:if i in dict.keys():dict[i] = int(dict[i]) +1else:dict[i] = 1

（3）Counter（速度快）

l = [[1,2,3,4,5],[1,2,3,4,5],[5,6,7,8,9]]

cnt = Counter()
for i in l:i = tuple(i)cnt[i] += 1