first unique character in a string python

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Helena
28 Oct 2017
1class Solution(object):
2   def firstUniqChar(self, s):
3      """
4      :type s: str
5      :rtype: int
6      """
7      frequency = {}
8      for i in s:
9         if i not in frequency:
10            frequency[i] = 1
11         else:
12            frequency[i] +=1
13      for i in range(len(s)):
14         if frequency[s[i]] == 1:
15            return i
16      return -1
17ob1 = Solution()
18print(ob1.firstUniqChar("people"))
19print(ob1.firstUniqChar("abaabba"))
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