from pycocotools.coco import COCO
from pycocotools.cocoeval import COCOeval

annFile = './ground_truth.json'
cocoGt=COCO(annFile)
resFile = './results.json'
cocoDt=cocoGt.loadRes(resFile)

imgIds=sorted(cocoGt.getImgIds())

cocoEval = COCOeval(cocoGt,cocoDt,annType)
cocoEval.params.imgIds = imgIds
cocoEval.evaluate()
cocoEval.accumulate()
cocoEval.summarize()