def corofunc2():
            called[1] += 1
            return event.ReturnValue(insert_events=[evt3], append_events=[evt2])
def __init__(self, table=None, n_classes=2, class_names=("1", "0")):
        self.table = table
        self.n_classes = n_classes
        self.class_names = class_names
        if table is None:
            self.table = np.zeros((self.n_classes, self.n_classes), dtype=int)