I get a error when using HoughCircles with Python OpenCV that a module is missing [duplicate]

Question

I have a small test code block trying to process a simple photo with a ball in it:

#!/usr/local/bin/python
import cv2
import numpy as np

img = cv2.imread("b.jpg")
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
circles = cv2.HoughCircles(gray,cv2.CV_HOUGH_GRADIENT)

When I try to run this I get:

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

I've been installing and reinstalling for two days trying to figure out whats wrong. Any help or pointers would be appreciated!

Answer 1

try

circles = cv2.HoughCircles(gray, cv2.cv.CV_HOUGH_GRADIENT, 1.2, 75)

works, to me