Gene Books Code | Python Fiddle

#! /usr/bin/env python
# coding: 'utf-8'
#-------------------------------------------------------------------------------
# Name:        books
# Purpose:
#
# Author:      kmaruta
#
# Created:     09/03/2012
# Copyright:   (c) kmaruta 2012
# Licence:     <your licence>
#-------------------------------------------------------------------------------

def chk_code(code):
    if code == None:
        return 0

length = len(code)

if length < 9 or length > 13 or length == 11:
        return 0
    elif length == 10 and code[0:9].isdigit() != True:
        return 0
    elif length != 10 and code.isdigit() != True:
        return 0
    else:
        return length

def get_jan(isbn_or_jan):
    if chk_code(isbn_or_jan) == 0:
        return ''

jan_tmp = isbn_or_jan

if len(jan_tmp) <= 10:
        jan_tmp = '978' + jan_tmp

weight = 3
    check_sum = 0

for i in range(12, 0, -1):
        check_sum = check_sum + int(jan_tmp[i - 1:i]) * weight
        weight = 4 - weight

jan_tmp = jan_tmp[0:12] + str((10000 - check_sum) % 10)

return jan_tmp

def get_isbn(isbn_or_jan):
    length = chk_code(isbn_or_jan)

if length == 0:
        return ''

if length > 10:
        isbn_tmp = isbn_or_jan[3:13]
    else:
        isbn_tmp = isbn_or_jan

check_sum = 0

for i in range(0, 9):
        check_sum = check_sum + int(isbn_tmp[i:i + 1]) * (10 - i)

check_dgt = 11 - ((check_sum + 11) % 11)

if check_dgt >= 11:
        isbn_tmp = isbn_tmp[0:9] + '0'
    elif check_dgt == 10:
        isbn_tmp = isbn_tmp[0:9] + 'X'
    else:
        isbn_tmp = isbn_tmp[0:9] + str(check_dgt)

return isbn_tmp

def get_jan_sprt(isbn_or_jan):
    jan = get_jan(isbn_or_jan)

if jan == '':
        return ''

if jan[4:6] < '20':
        cp = 6
    elif jan[4:7] < '700':
        cp = 7
    elif jan[4:8] < '8500':
        cp = 8
    elif jan[4:9] < '90000':
        cp = 9
    elif jan[4:10] < '950000':
        cp = 10
    else:
        cp = 11

return jan[0:3] + '-' + jan[3:4] + '-' + jan[4:cp] + \
                      '-' + jan[cp:12] + '-' + jan[12:13]

def get_mgz_jan(mgzn_cd):
    if chk_code(mgzn_cd) == 0:
        return ''

jan_tmp = mgzn_cd

if len(jan_tmp) <= 10:
        jan_tmp = '491' + jan_tmp

weight = 3
    check_sum = 0

for i in range(12, 0, -1):
        check_sum = check_sum + int(jan_tmp[i - 1:i]) * weight
        weight = 4 - weight

jan_tmp = jan_tmp[0:12] + str((10000 - check_sum) % 10)

return jan_tmp

def main():
##    print get_mgz_jan('09751-06')
##    print get_jan_sprt('430902514')
    print get_isbn('9764904563184')

if __name__ == '__main__':
    main()

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