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

1. # -*- coding: utf-8 -*-
   
2. # Python 3.3.1
   
3. 
   
4. _str = "aAsmr3idd4bgs7Dlsf9eAF"
   
5. count = {}
   
6. 
   
7. for _item in sorted(list(_str)):
   
8.     if _item in count:
   
9.         count[_item] += 1
   
10.     else:
    
11.         count[_item] = 1
    
12.         
    
13. 
    
14. print(sorted([(count,word) for word,count in count.items()],reverse=True)[0])
    
15. 
    
16. input()
    

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Batcher

1. def fun(a):
   
2.     return a[1]
   
3. 
   
4. a = "aAsmr3idd4bgs7Dlsf9eAF"
   
5. l = ([(x, a.count(x)) for x in set(a)])
   
6. 
   
7. l.sort(key = fun, reverse=True)
   
8. print "%s : %s" % (l[0][1], l[0][0])

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Batcher

1. a = "aAsmr3idd4bgs7Dlsf9eAF"
   
2. l = ([(x, a.count(x)) for x in set(a)])
   
3. 
   
4. b = 3
   
5. l.sort(key = lambda l: l[1] + b, reverse=True)
   
6. print "%s : %s" % (l[0][1], l[0][0])

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