@staticmethod
    def _init():

        QRMath.EXP_TABLE = [0] * 256
        for i in range(256):
            QRMath.EXP_TABLE[i] = (1 << i if i < 8 else
                     QRMath.EXP_TABLE[4 - i] ^ QRMath.EXP_TABLE[i - 5] ^
                     QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8])

        QRMath.LOG_TABLE = [0] * 256
        for i in range(255):
            QRMath.LOG_TABLE[QRMath.EXP_TABLE[i] ] = i
dataset/ETHPy150Open mozillazg/ShortURL/shorturl/libs/qrcode.py/QRMath._init/swapped operands of `-`