统计列表中每个元素出现的次数python 统计每个数出现的次数python

**方法一：使用函数counter,快速获取list中每个元素出现的次数**

from collections import Counter

list = [1,2,3,4,5,4,3,7,2,8,1]
num_Count=counter(list)
print(num_count)

def count(list):
		return count(list)
print(count(list))

以上两种都可以
结果  {1: 2, 2: 2, 3: 2, 4: 2, 5: 1, 7: 1, 8: 1}
**方法二：使用for循环** 


list = [1,2,3,4,5,4,3,7,2,8,1]
num_count={}
for i in list:
    if i not in num_count:
        num_count[i]=1
    else:
        num_count[i]+=1
print(num_count)

结果：{1: 2, 2: 2, 3: 2, 4: 2, 5: 1, 7: 1, 8: 1}