def num_to_code(user_number, part_number):
"""
Convert a user/part number combo to an alphanumeric asset code.
:param user_number int: The user number.
:param part_number int: The part number.
:returns: An asset code string.
:rtype: str
"""
if user_number < 0 or part_number < 0:
raise ValueError('User ({0}) or part ({1}) number cannot be '
'negative. '.format(user_number, part_number))
assetno = ''
for num in (user_number, part_number):
while True:
if num > 15:
r = num % 16
assetno = assetno + ALPHABET[r + 16]
num = num // 16
else:
assetno = assetno + ALPHABET[num]
break
checkdigit = luhn.calc_check_digit(assetno, ALPHABET)
assetno = assetno + checkdigit
assert luhn.is_valid(assetno, ALPHABET)
return assetno
def num_to_code(user_number, part_number):
"""
Convert a user/part number combo to an alphanumeric asset code.
:param user_number int: The user number.
:param part_number int: The part number.
:returns: An asset code string.
:rtype: str
"""
if user_number < 0 or part_number < 0:
raise ValueError('User ({0}) or part ({1}) number cannot be '
'negative. '.format(user_number, part_number))
assetno = ''
for num in (user_number, part_number):
while True:
if num > 15:
r = num % 16
assetno = assetno + ALPHABET[r + 16]
num = num // 16
else:
assetno = assetno + ALPHABET[num]
break
checkdigit = luhn.calc_check_digit(assetno, ALPHABET)
assetno = assetno + checkdigit
assert luhn.is_valid(assetno, ALPHABET)
return assetno
def test_normal(self):
for code, result in [('7894', '9')]:
self.assertEqual(luhn.calc_check_digit(code), result)
