def __init__(self, n_samples=3, lower=-1, upper=1):
        AbstractPitchShift.__init__(self)

        if lower <= upper:
            raise ValueError('upper must be strictly larger than lower')

        if n_samples <= 0:
            raise ValueError('n_samples must be strictly positive')

        self.n_samples = n_samples
        self.lower = float(lower)
        self.upper = float(upper)
dataset/ETHPy150Open bmcfee/muda/muda/deformers/pitch.py/LinearPitchShift.__init__/swapped operands of `<=`