import os

dir="/home/yuexi/data0/datasets/Night_Visdrone_mmyolo/swinir_color_dn_noise50/"
for filename in os.listdir("/home/yuexi/data0/datasets/Night_Visdrone_mmyolo/swinir_color_dn_noise50"):
    newname=filename[:-4]
    newname=newname+".jpg"
    os.rename(dir+filename,dir+newname)