在工作中我們經(jīng)常要統(tǒng)計數(shù)字，字符，文件名出現(xiàn)的次數(shù)，常用的方法是字典，其實還有個Counter可以使用

1.字典方法

L = ["a","b","c","d","e","f","g","j","o","a","c","d","e","b","e","g","a","a","c","d"]
d = {}

for i in L:
    if i in d:
        d[i] += 1
    else:
        d[i] = 1
print(d)

結(jié)果

2.使用collections里面的Counter

from collections import Counter

L = ["a","b","c","d","e","f","g","j","o","a","c","d","e","b","e","g","a","a","c","d"]
print(dict(Counter(L)))

使用Counter結(jié)果

當然還有很多可以統(tǒng)計比如某個目錄下的所有目錄里有的文件，有多少個名稱是一樣，也可以統(tǒng)計出來，像統(tǒng)計單詞個數(shù)之類的都可以使用，不過使用前要先生成list