20行Python代码搞定18位身份证验证

import reIDCARD_REGEX = '[1-9][0-9]{14}([0-9]{2}[0-9X])?'def is_valid_idcard(idcard):    """Validate id card is valid."""    if isinstance(idcard, int):        idcard = str(idcard)    if not re.match(IDCARD_REGEX, idcard):        return False    factors = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]    items = [int(item) for item in idcard[:-1]]    copulas = sum([a * b for a, b in zip(factors, items)])    ckcodes = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']    return ckcodes[copulas % 11].upper() == idcard[-1].upper()