模拟下载进度条

import time

def process(percent, width=30):
    percent = percent if percent <= 1 else 1
    text=('\r[%%-%ds]'%width)%('*'*int(width*percent))
    text=text+'%d%%'
    text=text%(percent*100)
    print(text,end='')

file_size=10240
cur_size=0
while True:
    time.sleep(0.01)
    cur_size+=20
    process(cur_size/file_size,100)
    if cur_size>=file_size:
        print('')
        print('finish')
        break

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