Using bin() and eval() functions clear solution for Multiplication Table by H0r4c3 - python coding challenges

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Using bin() and eval() functions solution in Clear category for Multiplication Table by H0r4c3

def checkio(first, second):
    result = 0
    for oper in ('&', '|', '^'):
        rows_sum = 0
        for i in bin(first)[2:]:
            rows = ''
            for j in bin(second)[2:]:
                rows += eval(f'str(int(i) {oper} int(j))')
            rows_sum += int(rows, 2)
        result += rows_sum
    return result

#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
    assert checkio(4, 6) == 38
    assert checkio(2, 7) == 28
    assert checkio(7, 2) == 18

Jan. 28, 2022

Comments:

lisovsky on Feb. 2, 2023, 1:22 p.m.
see how you can do without eval using operators from the module operator: <pre class='brush: python'>sum([op(int(bit * second.bit_length(), 2), second) for bit in bin(first)[2:] for op in (and_, or_, xor)]) </pre>

H0r4c3 on Feb. 2, 2023, 6 p.m.
Good use of operators from the module operator!

Mine

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