python face detection with open source library

Dear Python expert, Using the below tensorflow face detection library, I need a python script which can parse through a folder of images and detect faces (inference) [login to view URL] Following are the requirements. 1) Parse through a folder which can have 20,000+ image files 2) Detect faces and draw the bounding box and save to a folder named "detected" 3) Images without faces need to copied to another folder named "undetected" 4) Make the face-detect inferencing in multi thread so that the operation will complete faster. 5) The script needed to work in window OS. Happy bidding.