First Non Repeating Character

firstNonRepeatChar.py

def firstNotRepeatingCharacter(s):
    charArray = []
    charCount = {}

    for i in s:
        if i in charCount:
            charCount[i] +=1
        else:
            charCount[i] = 1
            charArray.append(i)

    for j in charArray:
        if charCount[j] == 1 :
            return j

    return "-1"