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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main(self, x):
 """ Transposed FIR structure """

        self.acc[0] = x * self.TAPS[-1]
        for i in range(1, len(self.acc)):
            self.acc[i] = self.acc[i - 1] + x * self.TAPS[len(self.TAPS) - 1 - i]

        self.out = self.acc[-1]
        return self.out