AttributeError: 'module' object has no attribute 'findChessboardCornersSB'

[lvxuanxuan123]

Traceback(most recent call last):
File "calibration.py", line 943, in
calibration(keep_list=None)
File "calibration.py", line 873, in calibration
corners_world, final_cost, corners_image = detection_result[idx].get()
File "/usr/lib/python2.7/multiprocessing/pool.py", line 572, in get
raise self._value
AttributeError: 'module' object has no attribute 'findChessboardCornersSB'

[wflin-linux]

opencv update 4 version，findChessboardCornersSB is not in versions below opencv 4