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pletnes/imocheck.py

Created December 23, 2022 10:21
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Python function that validates a vessel's IMO number, using the checksum digit (public domain license)
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imocheck.py
def is_imo(num: int):
"""
Validates IMO number using the checksum digit.
"""
ns = str(num)
sm = sum(d * d2 for d, d2 in zip(map(int, ns[:6]), range(7, -9, -1)))
return str(sm)[-1] == ns[-1]
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