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October 30, 2019 14:21
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This script generates a random EAN13 number and prints it to the standard out.
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| #! /usr/bin/python | |
| from random import randrange | |
| def generate_12_random_numbers(): | |
| numbers = [] | |
| for x in range(12): | |
| numbers.append(randrange(10)) | |
| return numbers | |
| def calculate_checksum(ean): | |
| """Calculates the checksum for EAN13-Code. | |
| @param list ean: List of 12 numbers for first part of EAN13 | |
| :returns: The checksum for `ean`. | |
| :rtype: Integer | |
| """ | |
| assert len(ean) == 12, "ean must be a list of 12 numbers for the first part of the EAN13" | |
| sum_ = lambda x, y: int(x) + int(y) | |
| evensum = reduce(sum_, ean[::2]) | |
| oddsum = reduce(sum_, ean[1::2]) | |
| return (10 - ((evensum + oddsum * 3) % 10)) % 10 | |
| x = int(raw_input('How many?')) | |
| for _ in range(x): | |
| numbers = generate_12_random_numbers() | |
| numbers.append(calculate_checksum(numbers)) | |
| print(''.join(map(str, numbers))) |
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