from tqdm import tqdm的补充

from tqdm import  tqdm
import time 
for i in tqdm(range(5)):
    time.sleep(1)
    print(i) ## 注意，这里的i是有实际值的

 20%|██        | 1/5 [00:01<00:04,  1.01s/it]
 0
 40%|████      | 2/5 [00:02<00:03,  1.01s/it]
 1
 60%|██████    | 3/5 [00:03<00:02,  1.01s/it]
 2
 80%|████████  | 4/5 [00:04<00:01,  1.01s/it]
 3
100%|██████████| 5/5 [00:05<00:00,  1.01s/it]
4