KlammernChecken

def klammern(string):
    liste = []
    append = liste.append
    pop = liste.pop
    for k in string:
        if k in "({[":
            append(k)
        if k in "]})":
            if ord(k) >= ord(liste[-1]) <ord(k)+3:
                pop()
            else:
                return False
        print(liste)
    return True