["python","opencv"]
Clone an image in cv2 Python

I'm new to OpenCV. What is the Python function which act the same as cv::clone() in C++? I just try to get a rect by rectImg = img[10:20, 10:20] but when I draw a line on it, I find the line appear both on img and the rectImage, so, how can I get this done?
Abid Rahman K's answer is correct, but you say that you are using cv2 which inherently uses NumPy arrays. So, to make a complete different copy of say "myImage": newImage = myImage.copy() The above is enough. There isn't any need to import NumPy (numpy).