?iY FdZddlmZddld d dZd d dZd d dZd d dZy) aThe ISO 7064 Mod 37, 2 algorithm. The Mod 37, 2 checksum can be used for alphanumeric numbers and the check digit may also be numeric, a letter or '*'. >>> calc_check_digit('G123489654321') 'Y' >>> validate('G123489654321Y') 'G123489654321Y' >>> checksum('G123489654321Y') 1 By changing the alphabet this can be turned into any Mod x, 2 algorithm. For example Mod 11, 2: >>> calc_check_digit('079', alphabet='0123456789X') 'X' >>> validate('079X', alphabet='0123456789X') '079X' >>> checksum('079X', alphabet='0123456789X') 1 ) annotations)*cbt|}d}|D]}d|z|j|z|z}|S)zCCalculate the checksum. A valid number should have a checksum of 1.r)lenindex)numberalphabetmoduluscheckns ^/var/www/html/myprovider/mon_projet_qr/lib/python3.12/site-packages/stdnum/iso7064/mod_37_2.pychecksumr0s@(mG E :UX^^A..'9: LcHt|}|ddt||zz |zS)z^Calculate the extra digit that should be appended to the number to make it a valid number.r)rr)r r r s rcalc_check_digitr9s.(mG QXfh7777B CCrcl t||dk(}|s t|S#t$r twxYw)'Check whether the check digit is valid.r)r Exception InvalidFormatInvalidChecksum)r r valids rvalidater@sD*a/  M os3cL tt||S#t$rYywxYw)rF)boolrValidationError)r r s ris_validrKs+HVX.// s  ##N)z%0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ*)r strr rreturnint)r rr rr r)r rr rr r)__doc__ __future__rstdnum.exceptionsrrrrrrr&s'(.#Dr