[问题求助] Python怎样找出字符串中出现次数最多的字符？

Python

Python怎样找出字符串中出现次数最多的字符？
已知字符串：
a = "aAsmr3idd4bgs7Dlsf9eAF"
希望找到出现次数最多的字符及其出现的次数：
3 : s

ShadowFiend

# -*- coding: utf-8 -*-
# Python 3.3.1

_str = "aAsmr3idd4bgs7Dlsf9eAF"
count = {}

for _item in sorted(list(_str)):
    if _item in count:
        count[_item] += 1
    else:
        count[_item] = 1
        

print(sorted([(count,word) for word,count in count.items()],reverse=True)[0])

input()
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Batcher

def fun(a):
    return a[1]

a = "aAsmr3idd4bgs7Dlsf9eAF"
l = ([(x, a.count(x)) for x in set(a)])

l.sort(key = fun, reverse=True)
print "%s : %s" % (l[0][1], l[0][0])
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Batcher

a = "aAsmr3idd4bgs7Dlsf9eAF"
l = ([(x, a.count(x)) for x in set(a)])

b = 3
l.sort(key = lambda l: l[1] + b, reverse=True)
print "%s : %s" % (l[0][1], l[0][0])
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