# stdnum.pl.nip

NIP (Numer Identyfikacji Podatkowej, Polish VAT number).

The NIP (Numer Identyfikacji Podatkowej) number consists of 10 digit with a straightforward weighted checksum.

    >>> validate('PL 8567346215')
    '8567346215'
    >>> validate('PL 8567346216')  # invalid check digits
    Traceback (most recent call last):
        ...
    InvalidChecksum: ...
    >>> format('PL 8567346215')
    '856-734-62-15'

stdnum.pl.nip.checksum(number: str) → int

  Calculate the checksum.

stdnum.pl.nip.compact(number: str) → str

  Convert the number to the minimal representation. This strips the number of any valid separators and removes surrounding whitespace.

stdnum.pl.nip.format(number: str) → str

  Reformat the number to the standard presentation format.

stdnum.pl.nip.is_valid(number: str) → bool

  Check if the number is a valid VAT number.

stdnum.pl.nip.validate(number: str) → str

  Check if the number is a valid VAT number. This checks the length, formatting and check digit.