python 中有趣的库tqdm

Tqdm 是 Python 进度条库，可以在 Python 长循环中添加一个进度提示信息用法：tqdm(iterator)

# 方法1：
import time
from tqdm import tqdm  

for i in tqdm(range(100)): time.sleep(0.01) 方法2： import time from tqdm import trange for i in trange(100): time.sleep(0.01) 

结果：

 0%|          | 0/100 [00:00<?, ?it/s] 11%|█ | 11/100 [00:00<00:00, 100.00it/s] 22%|██▏ | 22/100 [00:00<00:00, 100.00it/s] 32%|███▏ | 32/100 [00:00<00:00, 100.00it/s] 43%|████▎ | 43/100 [00:00<00:00, 100.00it/s] 54%|█████▍ | 54/100 [00:00<00:00, 100.00it/s] 64%|██████▍ | 64/100 [00:00<00:00, 99.11it/s] 74%|███████▍ | 74/100 [00:00<00:00, 99.37it/s] 85%|████████▌ | 85/100 [00:00<00:00, 99.56it/s] 95%|█████████▌| 95/100 [00:00<00:00, 99.69it/s] 100%|██████████| 100/100 [00:01<00:00, 99.70it/s] 

可以为进度条设置描述：

import time
from tqdm import tqdm

pbar = tqdm(["a", "b", "c", "d"]) for char in pbar: # 设置描述 pbar.set_description("Processing %s" % char) time.sleep(1) 

结果：

0%|          | 0/4 [00:00<?, ?it/s] Processing a: 25%|██▌ | 1/4 [00:01<00:03, 1.00it/s] Processing b: 50%|█████ | 2/4 [00:02<00:02, 1.00it/s] Processing c: 75%|███████▌ | 3/4 [00:03<00:01, 1.00it/s] Processing d: 100%|██████████| 4/4 [00:04<00:00, 1.00it/s] 

手动控制进度：

import time
from tqdm import tqdm

# 一共200个，每次更新10，一共更新20次
with tqdm(total=200) as pbar: for i in range(20): pbar.update(10) time.sleep(0.1) #方法2： pbar = tqdm(total=200) for i in range(20): pbar.update(10) time.sleep(0.1) # close() 不要也没出问题？ pbar.close() 

结果：

  0%|          | 0/200 [00:00<?, ?it/s] 15%|█▌ | 30/200 [00:00<00:01, 150.00it/s] 25%|██▌ | 50/200 [00:00<00:01, 130.43it/s] 30%|███ | 60/200 [00:00<00:01, 119.52it/s] 40%|████ | 80/200 [00:00<00:01, 112.91it/s] 50%|█████ | 100/200 [00:00<00:00, 108.70it/s] 55%|█████▌ | 110/200 [00:01<00:00, 105.93it/s] 65%|██████▌ | 130/200 [00:01<00:00, 104.08it/s] 75%|███████▌ | 150/200 [00:01<00:00, 102.82it/s] 80%|████████ | 160/200 [00:01<00:00, 101.96it/s] 85%|████████▌ | 170/200 [00:01<00:00, 96.38it/s] 90%|█████████ | 180/200 [00:01<00:00, 97.44it/s] 100%|██████████| 200/200 [00:01<00:00, 98.19it/s] 

更多用法，学习完后再补充：
https://blog.csdn.net/langb2014/article/details/54798823?locationnum=8&fps=1