balanced_brackets

def balanced(text, brackets="()[]{}<>"):
    opening, closing = brackets[::2], brackets[1::2]
    stack = []
    for character in text:
        if character in opening:
            stack.append(opening.index(character))
        elif character in closing:
            if stack and stack[-1] == closing.index(character):
                stack.pop()
            else:
                return False
    return (not stack)