这个循环里的tmp如何才能设置成临时变量啊

我这段代码大致意思是判断下有没有人脸坐标 ，如果有保存下坐标，然后剪裁人脸，如果没有，就用上个循环的坐标剪裁图片
for detection in results.detections:

                mp_drawing.draw_detection(annotated_image, detection)
                coording = mp_drawing.draw_detection(annotated_image, detection)
                if coording[0] == None:
                    a = tmp[0]
                    b = tmp[1]
                    c = tmp[2]
                    d = tmp[3]
                    print (tmp)
                else:
                    a = coording[0][0]
                    b = coording[0][1]
                    c = coording[1][0]
                    d = coording[1][1]


                cv2.rectangle(annotated_image, (a, b), (c, d), (0, 0, 255), thickness=1)
                tmp=[a,b,c,d]

                print(tmp)
                image = annotated_image[b:d, a:c]
                image=cv2.resize(image,(112,112))

这跟你tmp到底是临时变量还是全局变量没有关系
你的a,b,c,d不就是干这个的吗，直接拿来用就行了，要tmp干什么