How machine learning is done in ue4 projects?

I am quite new to ue4. Recently i tried to use UnrealEnginePython plugin of 20tab for python in a project. Since python is experimental only in ue4.

I tried to do some image matching using python. But this plugin is called off development since epic did not respond to them or something. I saw some tensorflow things people did using the same plugin for python.

So my question is how people do machine learning stuff in ue4. Since python is off the hook, they do it in C++?

So if i want to do image processing stuff either i do it using python in web and fetch the result from ue4? or using c++, i do image processing stuff.

I am very sorry as my knowledge is not that good yet. Thank you very much for any advice.