Python 产生和验证IMEI

def luhn_residue(digits):
    return sum(sum(divmod(int(d)*(1 + i%2), 10))
                 for i, d in enumerate(digits[::-1])) % 10
def getImei(N):
    part = ''.join(str(random.randrange(0,9)) for _ in range(N-1))
    res = luhn_residue('{}{}'.format(part, 0))
    return '{}{}'.format(part, -res%10)

　　

测试如下：

>>> luhn_residue('79927398713')
0
>>> luhn_residue('05671564547361')
6
>>> luhn_residue(getImei(15))
0