python进度条tqdm使用方式

conda install tqdm

pip install tqdm

from tqdm import tqdm, trange

for i in tqdm(range(20), desc='It\'s a test'):
    time.sleep(0.1)

with tqdm(range(100), desc='Test') as tbar:
    for i in tbar:
        tbar.set_postfix(loss=i/100, x=i)
        tbar.update()  # 默认参数n=1，每update一次，进度+n
        time.sleep(0.2)

def trange(*args, **kwargs):
    """
    A shortcut for tqdm(xrange(*args), **kwargs).
    On Python3+ range is used instead of xrange.
    """
    return tqdm(_range(*args), **kwargs)

for i in trange(100, desc='Test1'):
    time.sleep(0.2)

with trange(100, desc='Test2') as tbar:
    for i in range(100):
        tbar.set_postfix(loss=i/100, x=i)
        tbar.update()
        time.sleep(0.2)

for i in tqdm(range(5), desc='Test'):
    tqdm.write('当前i={}'.format(i))
    time.sleep(0.5)

x = range(20)
y = range(20)
data = zip(x, y)
for i in tqdm(data, desc='Test', total=len(x)):
    time.sleep(0.1)

def process_bar(current, total, prefix='', auto_rm=True):
    bar = '=' * int(current / total * 50)
    bar = f' {prefix} |{bar.ljust(50)}| ({current}/{total}) {current / total:.1%} | '
    print(bar, end='\r', flush=True)
    if auto_rm and current == total:
        print(end=('\r' + ' ' * len(bar) + '\r'), flush=True)

for i in range(0, 100):
    time.sleep(0.1)
    process_bar(i+1, 100, '首部信息', auto_rm=False)

print('进度条演示')