def dist(a, b):
    return sum((i-j)**2 for i, j in zip(a, b))
def __init__(self, signum, signame):
            self.signum = signum
            self.signame = signame
            self.traceback_lines = traceback.format_stack()
            super(SignalHandler.SignalHandledNonLocalExit, self).__init__()