python怎么统计列表中元素的个数

# 方法一

List =[1,2,2,3,3,3,4,4,4,4,5,5,5,5,5]

Strlist=['A','B','B','C','C','C','D','D','D','D']

a=set(List)

b=set(Strlist)

print(List)

print(Strlist)

print(a)

for i in a:

    count =List.count(i)

    print(i,'出现的次数：',count)

for i in b:

    count =Strlist.count(i)

    print(i,'出现的次数：',count)

print('-'*20)

#方法二

List =[1,2,2,3,3,3,4,4,4,4,5,5,5,5,5]

Strlist=['A','B','B','C','C','C','D','D','D','D']

d1 = {}

d2 = {}

for i in List:

    if List.count(i) >= 1:

        d1[i] = List.count(i)

print(d1)

for i in Strlist:

    if Strlist.count(i) >= 1:

        d2[i] = Strlist.count(i)

print(d2)

print('-'*20)

#方法三

from collections import Counter

List =[1,2,2,3,3,3,4,4,4,4,5,5,5,5,5]

Strlist=['A','B','B','C','C','C','D','D','D','D']

res = Counter(List)

print(res)

res=Counter(Strlist)

print(res)