stdnum.fi.alv¶
ALV nro (Arvonlisäveronumero, Finnish VAT number).
The number is an 8-digit code with a weighted checksum.
>>> validate('FI 20774740')
'20774740'
>>> validate('FI 20774741') # invalid check digit
Traceback (most recent call last):
...
InvalidChecksum: ...
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stdnum.fi.alv.
checksum
(number)¶ Calculate the checksum.
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stdnum.fi.alv.
compact
(number)¶ Convert the number to the minimal representation. This strips the number of any valid separators and removes surrounding whitespace.
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stdnum.fi.alv.
is_valid
(number)¶ Check if the number is a valid VAT number.
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stdnum.fi.alv.
validate
(number)¶ Check if the number is a valid VAT number. This checks the length, formatting and check digit.