How to use the whitebox.whitebox_config.get function in whitebox

def setUp(self):
        self.apb3_duration = APB3_DURATION
        self.interp = 1
        self.fifo_depth = 64
        self.bulk_size = 16
        self.sample_rate = 6.144e6
        self.freq = 1.7e3 
        self.status = WES_FILTEREN

        self.cic_order = whitebox_config.get('cic_order', 4)
        self.cic_delay = whitebox_config.get('cic_delay', 1)
        self.shift = cic_shift(9, 10, self.interp,
                self.cic_order, self.cic_delay)
        print 'shift', self.shift

        # Input signal
        self.cnt = 128
        self.duration = (self.cnt * self.interp) / self.sample_rate
        self.n = np.arange(self.cnt)
        self.x = np.zeros(self.cnt, dtype=np.complex128)
        self.x[0] = (1 << 14) + 1j * (1 << 14)

        #output signal
        self.y = np.zeros(self.interp*self.cnt, dtype=np.complex128)
        for i in range(self.interp):
            self.y[i] = (1 << 7) + 1j * (1 << 7)

def setUp(self):
        self.apb3_duration = APB3_DURATION
        self.fifo_depth = 64
        self.bulk_size = 16
        self.sample_rate = 6.144e6
        self.freq = 1.7e3 
        self.interp = 1
        self.status = WES_DDSEN | WES_FILTEREN

        cic_order = whitebox_config.get('cic_order', 4)
        cic_delay = whitebox_config.get('cic_delay', 1)
        self.shift = cic_shift(9, 10, self.interp, cic_order, cic_delay)

        self.cnt = 512
        self.n = np.arange(0, self.cnt)
        self.x = np.array([((1 << 15)-1) + 1j * ((1 << 15)-1) \
                for i in range(self.cnt)], dtype=np.complex128)
        WhiteboxSpectrumMaskTestCase.setUp(self)