Python Brackets

lastBracket = 0
left = 0
right = 0
index = 0

def violated_balanced(s):
    global lastBracket, left, right ,index
    if(index < len(s)):
        if s[index] == '(':
            left += 1
            lastBracket = index
        elif s[index] == ')':
            right += 1
            lastBracket = index
        index += 1
        return violated_balanced(s)
    else:
        if right != left:
            return index
        return -1

def main():
    x = violated_balanced("t(())")
    print x

# Here's our payoff idiom!
if __name__ == '__main__':
    main()