stdnum.imo

IMO number (International Maritime Organization number).

A number used to uniquely identify ships (the hull) for purposes of registering owners and management companies. The ship identification number consists of a six-digit sequentially assigned number and a check digit. The number is usually prefixed with “IMO”.

Note that there seem to be a large number of ships with an IMO that does not have a valid check digit or even have a different length.

>>> validate('IMO 9319466')
'9319466'
>>> validate('IMO 8814275')
'8814275'
>>> validate('8814274')
Traceback (most recent call last):
    ...
InvalidChecksum: ...
>>> format('8814275')
'IMO 8814275'

stdnum.imo.calc_check_digit(number: str) → str

Calculate the check digits for the number.

stdnum.imo.compact(number: str) → str

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

stdnum.imo.format(number: str) → str

Reformat the number to the standard presentation format.

stdnum.imo.is_valid(number: str) → bool

Check if the number provided is valid. This checks the length and check digit.

stdnum.imo.validate(number: str) → str

Check if the number provided is valid. This checks the length and check digit.