I have followde the image:

I want to extract only lines from it — only lines without text.

What would be the best practice to do this?

I tried with the cv2 Python library and HoughLinesP with following the code:

img = cv2.imread('/Users/tekija/Documents/image.png')
img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
img_thr = cv2.threshold(img_gray, 120, 255, cv2.THRESH_BINARY)
lines = cv2.HoughLinesP(
img_thr, rho=1, theta=np.pi / 180, threshold=128, minLineLength=600, maxLineGap=30)
lines = lines.squeeze()

but results are: