can not find libdarknet.so

[CS4Liu]

I have done all the prepared work, and run "./darknet detector test cfg/coco.data cfg/yolov3-tiny.cfg yolov3-tiny.weights data/person.jpg " successfully. But when I use the python code called "darknet.py", comes the error:"OSError: ./libdarknet.so: cannot open shared object file: No such file or directory" I try to find this file and move them to the same sub-floder, but I can not find libdarknet.so in ./obj . how can I solve this problem