找出字符串中重复的字母

 1 #encoding=utf-8
 2 #查找给定的字符串中的重复元素
 3 
 4 #用于删除列表中不是字母的元素
 5 def delete(alist):
 6     for i in alist:
 7         if (i>= ‘A‘ and i <= ‘Z‘ or i>= ‘a‘ and i <= ‘z‘):
 8             return True
 9         else:
10             return False
11 
12 
13 the_string = raw_input("please enter a character string:")
14 the_string = list(the_string)
15 the_string = filter(delete,the_string)    #将列表中不是字母的元素过滤掉
16 norepeat = []
17 the_repeat = []
18 for x in the_string:
19     if x not in  norepeat:
20         norepeat.append(x)
21     else:
22         if x in the_repeat:
23             pass
24         else:
25             the_repeat.append(x)
26 print  "the repeat character is %s"% the_repeat

 1 #查找给定的字符串中的重复元素
 2 #用于删除列表中不是字母的元素
 3 def delete(alist):
 4     for i in alist:
 5         if (i>= ‘A‘ and i <= ‘Z‘ or i>= ‘a‘ and i <= ‘z‘):
 6             return True
 7         else:
 8             return False
 9 
10 the_string = raw_input("please enter a character string:")
11 the_string = list(the_string)
12 the_string = filter(delete,the_string)    #将列表中不是字母的元素过滤掉
13 the_repeat = set()
14 norepeat = set()
15 for x in the_string:
16     if x not in norepeat:
17         norepeat.add(x)
18     else:
19         the_repeat.add(x)
20 print "the repeat character is %s"%the_repeat