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Module isbn

setzer_model

Module isbn 

Source
Expand description

ISBNs as Kernsetzer reads them, one rule for print pre-flight, the EPUB’s dc:identifier and the app’s book details.

Functions§

digits
The digits of a valid ISBN-10 or ISBN-13, an ISBN-10’s check digit X in capitals: hyphens, spaces and an ISBN prefix allowed, check digit verified. None for anything else.
is_valid
Whether s is a valid ISBN-10 or ISBN-13 as digits reads one.