I want to track a flying ball and make sure it passed through a vertical ring 9mtr high and placed at a distance of 3mtr from camera. Please help in python. [closed]

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Please read the FAQ. Specifically the bit that says "Please do not beg for code, instead try some tutorials and tell us what is going wrong."

We are here to help with problems and answer questions. Not do things for you. When something doesn't work the way you expect it, we can help. If you've tried lots of things, tell us what you've tried and we can make suggestions.

"I want ..." doesn't work.