Find the first non-repeated character in a string

Question

I read of a job interview question to write some code for the following:

Write an efficient function to find the first nonrepeated character in a st

Answer 1

Simple Python3 solution

def findFirstUniqueChar(s):
    d = {}
    for c in s:
        if c in d:
            d[c] += 1
        else:
            d[c] = 1

    for c in s:
        if d[c] == 1:
            return s.index(c)
    return -1