image processing with python

[Noam]

Hello, this year my team decided we want to use a camera for image processing (with opencv 3)
We are program the robot with Java, but we want to do the image processing with Python. (because it easier) I have a code in Python that detect faces, and detect the side and the size (regardless of the robot), and I want to use it for the robot. (of course face detection is useless for the robot, but just for the training)
How can I combine the Python code with the Java code ?
(or it may be better to program the entire robot in python ? (I noticed just today that it's possible to program the robot with Python, so I don't know much about it))

Thanks in advance