import os,shutil

allimgs_path = "paper_data/images"
valimgs_path = "paper_data/val_imgs"
valtxt_path = "paper_data/ImageSets/Main/val.txt"

with open(valtxt_path, "r", encoding='UTF-8') as val_file:
    val_lines = val_file.readlines()
lines_num = len(val_lines)
print("lines_num:",lines_num)
i=0
for val_line in val_lines:

    imgname = val_line.strip("\n").strip("\r")+".jpg"
    print(imgname)
    if imgname in os.listdir(allimgs_path):
        img_path = f"{allimgs_path}/{imgname}"
        shutil.copy(img_path,valimgs_path)
        if i == lines_num:
            break
        i+=1