计算各字母出现的次数

已知字符串str="skdaskerkjsalkj",请统计该字符串中各字母出现的次数

str1="skdaskerkjsalkj"
str2=set(str1)
for i in str2:
    sum0=0
    for t in str1:
        if t==i:
            sum0+=1
    print('字母:',i,' ','出现次数：',sum0)

哎呀，大意了，还以为是求重复次数最多的字符呢。重写一个。

>>> s = "skdaskerkjsalkj"
>>> for ch, n in zip(s, map(s.count, s)):
    print(ch, n)

    
s 3
k 4
d 1
a 2
s 3
k 4
e 1
r 1
k 4
j 2
s 3
a 2
l 1
k 4
j 2

from collections import Counter

str="skdaskerkjsalkj"

print(dict(Counter(str)))