[numpy问题]The truth value of an array with more than one element is ambiguous.

问题描述：在进行Hough圆变换时，须要输出一个圆的坐标：python circles = cv2.HoughCircles(canny, cv2.HOUGH_GRADIENT, 2, 40, param1=30, param2=30, minRadius=0, maxRadius=20) 接下来会根据这个圆的坐标来画圆心：web for circle in circles[0]: x=i

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