Python solution

[singh.aman]

class Solution(object):
    def firstUniqChar(self, s):
        """
        :type s: str
        :rtype: int
        """
        count_dict = {}
        # create char count
        for char in s:
            count_dict[char] = count_dict.get(char,0) +1
        # find char with count 1
        for i,char in enumerate(s):
            if count_dict[char] == 1:
                return i
        return -1