Python--unpack problem ocr_recognize Timeout, Exception:unpack requires a string argument of length 46

Robjbuff = "". Join (Unpack (' =%ds '% Objlen, recv_buf[6+i*objlen:6+ (i+1) *objlen]))
Score, Bbox1, Bbox2, Bbox3, Bbox4, p00, P01, P10, P11, P20, P21, P30, P31, p40, p41 = Unpack (' =5f10h ', Robjbuff)

Error Example:

Robjbuff = Unpack (' =%ds '% Objlen, recv_buf[6+i*objlen:6+ (i+1) *objlen])

Score, Bbox1, Bbox2, Bbox3, Bbox4, p00, P01, P10, P11, P20, P21, P30, P31, p40, p41 = Unpack (' =5f10h ', Robjbuff)

At this time the second unpack error: Ocr_recognize timeout, exception:unpack requires a string argument of length 40

, because Robjbuff is now a tuple tuple, not a list, so "". Join is converted.

Python--unpack problem ocr_recognize Timeout, Exception:unpack requires a string argument of length 46