tqdm模块

tqdm 是 Python 进度条库。

tqdm库下面有2个类我们经常使用：

1.

2.

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

trange(i) 是 tqdm(range(i)) 的简单写法。

可以总结为三个方法：

方法一：

# 方法1：
import time
from tqdm import tqdm  

for i in tqdm(range()):
    time.sleep(0.01)

方法1+：
import time
from tqdm import trange

for i in trange():
    time.sleep(0.01) 

结果如下：

  %|          | / [:<?, ?it/s]
 %|█         | / [:<:, .10it/s]
 %|██        | / [:<:, .77it/s]
 %|███       | / [:<:, .71it/s]
 %|████      | / [:<:, .49it/s]
 %|█████     | / [:<:, .56it/s]
 %|██████    | / [:<:, .82it/s]
 %|███████   | / [:<:, .57it/s]
 %|████████  | / [:<:, .44it/s]
 %|█████████ | / [:<:, .82it/s]
%|██████████| / [:<:, .81it/s]
%|██████████| / [:<:, .91it/s]
  %|          | / [:<?, ?it/s]
 %|█         | / [:<:, .74it/s]
 %|██        | / [:<:, .20it/s]
 %|███       | / [:<:, .83it/s]
 %|████      | / [:<:, .83it/s]
 %|█████     | / [:<:, .57it/s]
 %|██████    | / [:<:, .90it/s]
 %|███████   | / [:<:, .88it/s]
 %|████████  | / [:<:, .00it/s]
 %|█████████ | / [:<:, .69it/s]
%|██████████| / [:<:, .76it/s]
%|██████████| / [:<:, .71it/s]

方法二：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(0.2)

                %|          | / [:<?, ?it/s]
Processing a:   %|          | / [:<?, ?it/s]
Processing a:  %|██▌       | / [:<:,  .99it/s]
Processing b:  %|██▌       | / [:<:,  .99it/s]
Processing b:  %|█████     | / [:<:,  .99it/s]
Processing c:  %|█████     | / [:<:,  .99it/s]
Processing c:  %|███████▌  | / [:<:,  .99it/s]
Processing d:  %|███████▌  | / [:<:,  .99it/s]
Processing d: %|██████████| / [:<:,  .99it/s]
Processing d: %|██████████| / [:<:,  .99it/s]

方法三：手动更新

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:
  pbar.set_description("Processing")
  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)
pbar.close()

              0%|          | 0/200 [00:00<?, ?it/s]
Processing:   0%|          | 0/200 [00:00<?, ?it/s]
Processing:  10%|█         | 20/200 [00:00<00:00, 198.53it/s]
Processing:  15%|█▌        | 30/200 [00:00<00:01, 152.68it/s]
Processing:  20%|██        | 40/200 [00:00<00:01, 131.50it/s]
Processing:  25%|██▌       | 50/200 [00:00<00:01, 119.83it/s]
Processing:  30%|███       | 60/200 [00:00<00:01, 112.82it/s]
Processing:  35%|███▌      | 70/200 [00:00<00:01, 108.39it/s]
Processing:  40%|████      | 80/200 [00:00<00:01, 105.48it/s]
Processing:  45%|████▌     | 90/200 [00:00<00:01, 103.54it/s]
Processing:  50%|█████     | 100/200 [00:00<00:00, 102.21it/s]
Processing:  55%|█████▌    | 110/200 [00:01<00:00, 101.32it/s]
Processing:  60%|██████    | 120/200 [00:01<00:00, 100.70it/s]
Processing:  65%|██████▌   | 130/200 [00:01<00:00, 100.27it/s]
Processing:  70%|███████   | 140/200 [00:01<00:00, 100.17it/s]
Processing:  75%|███████▌  | 150/200 [00:01<00:00, 100.00it/s]
Processing:  80%|████████  | 160/200 [00:01<00:00, 99.78it/s]
Processing:  85%|████████▌ | 170/200 [00:01<00:00, 99.75it/s]
Processing:  90%|█████████ | 180/200 [00:01<00:00, 99.60it/s]
Processing:  95%|█████████▌| 190/200 [00:01<00:00, 99.71it/s]
Processing: 100%|██████████| 200/200 [00:01<00:00, 99.68it/s]
Processing: 100%|██████████| 200/200 [00:02<00:00, 99.39it/s]

  0%|          | 0/200 [00:00<?, ?it/s]
 10%|█         | 20/200 [00:00<00:00, 198.60it/s]
 15%|█▌        | 30/200 [00:00<00:01, 152.73it/s]
 20%|██        | 40/200 [00:00<00:01, 131.51it/s]
 25%|██▌       | 50/200 [00:00<00:01, 119.83it/s]
 30%|███       | 60/200 [00:00<00:01, 112.82it/s]
 35%|███▌      | 70/200 [00:00<00:01, 108.38it/s]
 40%|████      | 80/200 [00:00<00:01, 105.37it/s]
 45%|████▌     | 90/200 [00:00<00:01, 103.56it/s]
 50%|█████     | 100/200 [00:00<00:00, 102.19it/s]
 55%|█████▌    | 110/200 [00:01<00:00, 101.52it/s]
 60%|██████    | 120/200 [00:01<00:00, 100.93it/s]
 65%|██████▌   | 130/200 [00:01<00:00, 100.43it/s]
 70%|███████   | 140/200 [00:01<00:00, 100.08it/s]
 75%|███████▌  | 150/200 [00:01<00:00, 100.04it/s]
 80%|████████  | 160/200 [00:01<00:00, 99.90it/s]
 85%|████████▌ | 170/200 [00:01<00:00, 99.92it/s]
 90%|█████████ | 180/200 [00:01<00:00, 99.81it/s]
 95%|█████████▌| 190/200 [00:01<00:00, 99.86it/s]
100%|██████████| 200/200 [00:01<00:00, 99.78it/s]
100%|██████████| 200/200 [00:02<00:00, 99.47it/s]