python: 显示进度条

from tqdm import tqdm

try:
    from tqdm import tqdm
except:
    import os
    os.system('sudo pip3 install tqdm')
    from tqdm import tqdm

lst = [1, 2, 3]
pbar = tqdm(lst)

for (idx, ele) in enumerate(pbar):
    main()
    pbar.set_description(' COMPLETE ')

pbar = tqdm(list(zip(img_paths, anno_paths)))
for idx, (img_path, anno_path) in enumerate(pbar):
    main()
    pbar.set_description(' COMPLETE ')