def unescape(self):
        if not self.has_escape:
            return self
        unescaped = ''
        l = len(self.value)
        i = 0
        while i < l:
            c = self.value[i]
            i += 1
            if c == '\\':
                if i >= l:
                    raise dns.exception.UnexpectedEnd
                c = self.value[i]
                i += 1
                if c.isdigit():
                    if i >= l:
                        raise dns.exception.UnexpectedEnd
                    c2 = self.value[i]
                    i += 1
                    if i >= l:
                        raise dns.exception.UnexpectedEnd
                    c3 = self.value[i]
                    i += 1
                    if not (c2.isdigit() and c3.isdigit()):
                        raise dns.exception.SyntaxError
                    c = chr(int(c) * 100 + int(c2) * 10 + int(c3))
            unescaped += c
        return Token(self.ttype, unescaped)

    # compatibility for old-style tuple tokens
dataset/ETHPy150Open catap/namebench/nb_third_party/dns/tokenizer.py/Token.unescape/original