def signal_handler(self, signum=None, frame=None):
        self.signal_shutdown()
eval bkg(kraw) and chi(k) for knots, coefs, order
dataset/ETHPy150Open StorjOld/downstream-farmer/downstream_farmer/utils.py/ShellApplication.signal_handler--crossover with--dataset/ETHPy150Open xraypy/xraylarch/plugins/xafs/autobk.py/spline_eval