Created
January 27, 2013 08:58
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A simple method to convert ISBN13 to ISBN10.
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| def isbn_13_to_10 (isbn): | |
| count = 0 | |
| isbn = isbn[3:12] | |
| for x in range(0, 9): | |
| count += int(isbn[x]) * (10 - x) | |
| z = (11 - (count % 11)) % 11 | |
| if (z == 10): | |
| z = 'X' | |
| return isbn + str(z) |
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