查看lmdb中的数据

import lmdb
import caffe
lmdbpath='/data2/guoyu/rmppe/Realtime_Multi-Person_Pose_Estimation/training/COCO_kpt/lmdb'
datum = caffe.proto.caffe_pb2.Datum()
env=lmdb.open(lmdbpath)
txn=env.begin()
cursor=txn.cursor()
for key,value in cursor:
    datum.ParseFromString(value)
    data=caffe.io.datum_to_array(datum)
    print data[3,:,:]