进度百分比

•  输出进度百分比

import time

def bar(num=1, total=100):
    rate = float(num) / float(total)
    rate_num = int(rate * 100)
    temp = '\r%d %%' % (rate_num, )
    sys.stdout.write(temp)
    sys.stdout.flush()

def test():
    i = 0
    while True:
        i += 1
        time.sleep(0.1)
        bar(i, 100)
        if i == 100:
            break

if __name__ == '__main__':
    test()